Answering a bunch of fish questions with SciShow Resident Jaida Elcock! Subscribe to Jaida Here: @soFISHtication_ Complexly Learnathon Here: complexly.com/learnathon
Fyi: ana- is the greek prefix for "up" and cata-/kata- is the prefix for "down". -dromous would be similar to -ward (means road in modern greek, but "anadromic[-os]" means regressive/regressively, so it's also used metaphorically) --> I imagine anadromous fish are called that for swimming "upwards" along rivers and streams, whereas catadromous ones swim downwards (to get to the spawning habitat)
The ions are named after the electrodes, which in turn are named for the direction of conventional current (cathodes are the source, from which conventional current "rises", and anodes the sink, into which it "descends"). Thank you, Online Etymological Dictionary (and Wikipedia)!
As a bonus: "kata-" is also where we get "catastrophe" which literally means "downturn", and the root for that ending "-dromous" is also why we have "dromedary" camels (it means to run, as in racing)
The size ranges on catfish is kind of crazy. It really depends on the species. The smallest species is 3-3.5cm. You could probably fit thousands in a minivan.
surely millions if they're that small. at that point i think it'd be difficult to even find enough catfish to fit in a minivan though, so realistically maybe only thousands yeah idk
@@hannahjohnson4885 my immediate thought as well (as the younger sib to a cancer survivor and a chronic illness patient myself thats a Thing my fam has had to deal with and its tough, i can't imagine being orin's age for it)
I didnt think they would keep doing videos together in this format but I'm so glad they are, the chemistry between these two is so engaging in these episodes
I love how utterly unprepared Hank was to learn about the size of some catfish. Like this man knows so much trivia you'd think nothing could truly phase him anymore. But apparently people-sized catfish was not on his radar 😂
I was shocked I knew something Hank didn’t! Catfish can grow to be enormous. I randomly saw a post about the biggest catfish ever caught and it was apparently about 9ft!
Obviously it was posited in the video "no arms, only hands" but I can't help but think perhaps the single greatest reason anyone is afraid of sharks is our perception of shark "attacks", and one of the greatest factors contributing to sharks biting things as the first and often only means of interacting with them is they lack any sort of grasping appendage. They have no hands but still must grab. They already "poke" stuff by bumping into it as they swim--and aren't exactly known for stellar vision--so "bite it" quickly becomes the next / only option for determining the nature of something they're curious about. Were people much better as shark food we'd likely have far more both "attacks" in the first place and fatalities resulting from them; most deaths following an attack are presently blood loss and/or drowning (with heavy correlation between the two) not continued interest and feeding response from the shark. They're not preying on us, they're wondering what the hell we are or mistaking us for a seal and quickly realizing their mistake. It's not really the sharks' fault the closest approximation to our hands they have available more closely resemble a bear trap.
"They have no hands, but still must grab" Iconic Edit: also, For me it's the eyes and the fact they usually just eat part of you and then leave that make shark attacks weirdly terrifying. Lots and lots of things can attack and eat chunks of my delicious human flesh, and would like... ACTUALLY eat me. but sharks have the coldest, deadest spooky eyes and would just float up from the abyss to take a few ribs as a souvenir and vanish. it just makes the idea of an attack more unsettling. Ugh
This was my thought exactly. Most attacks are them just being curious and having no way to explore that curiosity other than to gently nibble at the object of their curiosity with their massive crushing jaws and rows of cutting teeth. I feel like sharks having an alternate, and substantially less lethal, method of exploring their curiosity would be very beneficial to the subjects of their curiosity.
They're _already_ sharks, one of nature's (most nearly) perfect organisms adapted about as well as they can be for predatory life in an oceanic habitat; how much more evolutionary advantage do they really need?
Plus they are the only type of shark to actually want to eat humans, the other people-attacking sharks are typically outliers or starving, but bull sharks actually like eating people
The way Jaida thought of the term "Wetris" without even missing a beat -- Superb! Both videos I've seen with her this week have been really enjoyable. Although she's extremely busy working on her PhD, she's exactly the kind of person who will be able to inspire kids to study science, so I hope she will be seen on SciShow and other platforms as often as possible.
I don't know how ancient sheepshead or pacu are as species, but I love the idea of them being like "Ahem, I think you'll find YOU ALL HAVE SHEEPSHEAD FISH TEETH."
Hooray, Jaida's back! Catfish ditch day. Wetris. Anadromous. My brain is going to tuck these away to put on repeat when i least expect 😂. Loved this q&a. I think though sharks with hands would just look like they were jazzhandsing all the time?!
This is my ideal content, if there's a way to sponsor having the greens put out videos just talking with people nerdy about their fields, I would donate so much money
new and improved catfish question - what if you took every known species of "fish" that we consider as being "catfish" and ranked them according to the length of their adult forms and then put one of each into the car, then how far into the list would you go?
In what order? I feel like ordering them smallest to biggest would get you further in than Vice versa. However if you stuff the big fish in first, there's probably going to be room for the small fish between them. How whole do they have to be? And I am sure there's all sorts of variables I'm not taking into account
If you like animals that are named based on the way they look, Australia has lots. Although one downside is that you might think someone is talking about a specific species, when they're actually just describing the animal, or vice versa. Which could make a big difference, especially when it comes to something venomous. Different antivenom is needed for different snake bites, so it's important to to know if someone was bitten by a Brown Snake (for example), or if it was a snake that just happened to be brown, but that may or may not be a Brown Snake.
3:30 that was my first thought too Hank! Ana and cata made me think of anodes/cathodes or like you said anions/cations too. A quick google suggests that the ana/cata dichotomy means upward/downward, and the -dromous means "running", so anadromous fish run (swim) up(stream) to spawn, while catadromous fish run (swim) down(stream) to spawn.
I’m so glad I know Jaida Elcock exists now because everything I’ve seen her in is so exactly the kind of stuff I love. I’ve learned so many wild things in such a short time
Hank, I've started a playlist of 15 minute videos to watch while walking on my treadmill and I just gotta say thank you for hankschannel putting out almost exactly that length bangers. the playlist is like 50% you so far lol
I reckon all we need is the average volume of a catfish, simple as that. If they average x mass, then we can easily convert that to volume and figure out how many can fit in any vehicle! For the sake of simplicity of course we'd imagine all catfish are spherical.
10:37 this is called an “umwelt”, a term coined by the german baltic animal scientist named Jakob Johann Freiherr von Uexküll. very important theory in ethology!
More of this please. I'm late diagnosed ASD, and this stuff is the conversation happening in my mind. I wish we were friends... You folks are my people. Lol
I think you would first run into a weight issue rather than a size issue when trying to fill a vehicle with flesh. "Average catfish" apparently weighs about 20kg. "Average car" rated capacity is about 400kg. I know there is no such thing as an average catfish or average car but those are the first results to come up so I'm gonna roll with them. I guess that means 20 assuming they are both "average", whatever that means, and assuming you don't want to overload the vehicle. Also assuming you aren't driving the vehicle, so if you were I guess about 16 or so.
5:20 - this explains SO MUCH... I could never understand how people could use neti-pots when even getting a little water up my nose in the shower or pool totally freaks me out. I may actually be able to try this now...
I feel like Hank is usually THE MOST excited about stuff but Jaida's love of all things fish out does him this time and it's fun to see him confused about how someone can think all fish are just that cool/awesome/cute when he's usually on the other side of the equation 😂😂
The problem with naming things after what they look like is that similarity in looks does not correlate well with shared an ancestry and you end up with weird situations like the elephant shrew being more closely related to elephants than to shrews.
I actually have an answer to the ice cube question, shown to me by my dentist. We chew with the back teeth and it puts extra pressure on them. He showed me a visualization of that, and that's about when I agreed to invisalign to stop the habit.
Just going through university molecular biology and on top of everything else that is fabulous in this video THANK YOU so much for examples of osmosis/hypertonic/hypotonic 🥰🥰🥰
I have an axolotl, and when I clean out his tank, I remove him from the tank and put him in a separate tank to minimize the stress that he goes through. My axolotl tank has a net that acts as a hammock for him to chill on. Sometimes I relocate this hammock net to a different spot in the tank. When I put him back in the tank after relocating the hammock net, he will swim directly towards it and lay on it. How does he know where it is at? Axolotl’s are blind.
Have you seen how small the holes are that they lay their eggs in? Some can be a suprisingly small and cramped area for one to fit into, let alone two huge catfish at the same time. My point being you would probably be quite suprised at how many would accually fit.
I love this discussion, I am working on a writing project that includes aliens and there are things discussed here that I probably would've overlooked normally, specifically HOW we sense things that we just take for granted, that part broke my brain lol.
5:10 I had to do sinus rinses at one point due to an infection causing huge issues. I very much wondered why you were supposed to add salt to the water (but was too miserablr to look it up).
"I don't understand why it's not okay for us to chew ice cubes" made me pause in my actively chewing of ice cubes... for about 2 seconds, because nothing can stop me from chewing ice cubes.
My pet fish definitely can sense vibrations- had to move our blender bc it was too close to my fish and was scaring them! And they will come around and wait for me at the corner of the tank when i walk around in the morning, bc they know the rumble means im coming and they will go "food!!" I have not tested this extensively but i think they can differentiate my typical "about to feed" steps and other steps- when my roommates walk by they will not wait for them and if im super stressed or excited and moving around quicker they wont wait for me at all
I feel like the ice thing, at least as I heard it, was more specifically for if you have fillings because the filling is made of a different material than your teeth and thus contracts in response to cold at a different rate than your tooth and it can weaken or break the filling. I might be wrong, that's just what I remember hearing. Someone ask their dentist!
love the escalation of "tetris but Wet" "noo.... WETRIS! YEAH!!"
That's basically half of Dredge.
@@ataboo Wetris: Eldritch Edition (also known as "WEE")
Wetrix exists. It’s not fish, just water and walls, but it’s a Nintendo 64 game that I always sucked at.
They really match one another's geek in a great way.
Fyi: ana- is the greek prefix for "up" and cata-/kata- is the prefix for "down". -dromous would be similar to -ward (means road in modern greek, but "anadromic[-os]" means regressive/regressively, so it's also used metaphorically)
--> I imagine anadromous fish are called that for swimming "upwards" along rivers and streams, whereas catadromous ones swim downwards (to get to the spawning habitat)
The ions are named after the electrodes, which in turn are named for the direction of conventional current (cathodes are the source, from which conventional current "rises", and anodes the sink, into which it "descends").
Thank you, Online Etymological Dictionary (and Wikipedia)!
As a bonus: "kata-" is also where we get "catastrophe" which literally means "downturn", and the root for that ending "-dromous" is also why we have "dromedary" camels (it means to run, as in racing)
You're my hero.
@@requiembeeblebroxxOh hi! I've watched your Citation Needed playlist like a dozen times, enough that I recognized your picture
Catalysis -> speeds up reactions
Analysis -> ?
The size ranges on catfish is kind of crazy. It really depends on the species. The smallest species is 3-3.5cm. You could probably fit thousands in a minivan.
surely millions if they're that small. at that point i think it'd be difficult to even find enough catfish to fit in a minivan though, so realistically maybe only thousands yeah idk
catfish smuggling industry is gonna *love* this info
I was gonna say, I got a bunch of pygmy corydora in my fish tank and you could put more than 40 of them in a pint glass
They didn't specify adult either, and the fuckers are 3-4mm max when freshly hatched
Hanks son not wanting to hear the rest of the story because the dolphin was sick is the cutest thing 🥹
But maybe also don't read Charlotte's Web 🕸️🕷️
He sounds just like me! 😃
Okay but like, this broke my heart cuz Hank was very sick (cancer) and I wonder if that’s affected Orin 😭
@@hannahjohnson4885 my immediate thought as well (as the younger sib to a cancer survivor and a chronic illness patient myself thats a Thing my fam has had to deal with and its tough, i can't imagine being orin's age for it)
The catfish were all together in that car, its obvious they were going to SCHOOL…… 😂
"Some day you're going to die"... jaida really DOES have this job locked in
+
+
+
I didnt think they would keep doing videos together in this format but I'm so glad they are, the chemistry between these two is so engaging in these episodes
If sharks had hands they'd open cans of pepsi and make origami dolphins
I have a can of pepsi, in my hand, right now.
@@realscapegoat592are you a shark
😅😅😅
This shark just outed itself
Dolphins make origami out of sharks.
I love how utterly unprepared Hank was to learn about the size of some catfish. Like this man knows so much trivia you'd think nothing could truly phase him anymore. But apparently people-sized catfish was not on his radar 😂
I was shocked I knew something Hank didn’t! Catfish can grow to be enormous. I randomly saw a post about the biggest catfish ever caught and it was apparently about 9ft!
I love watching Hank absorb new information like you can tell that learning new things really gives this man the energy to live
Hank: “No idea what video I will put here”
*Goes to stock footage resource.*
Hank: I dunno. “Soup” I guess?!
The ocean is soup, after all.
Ahahahahahahaha “stock” 😂
@@ginaroussos 🤣 pun not intended, but wholeheartedly embraced!
As far as residents go, I feel Jaida is an excellent one!! Loving these talks
Obviously it was posited in the video "no arms, only hands" but I can't help but think perhaps the single greatest reason anyone is afraid of sharks is our perception of shark "attacks", and one of the greatest factors contributing to sharks biting things as the first and often only means of interacting with them is they lack any sort of grasping appendage. They have no hands but still must grab. They already "poke" stuff by bumping into it as they swim--and aren't exactly known for stellar vision--so "bite it" quickly becomes the next / only option for determining the nature of something they're curious about.
Were people much better as shark food we'd likely have far more both "attacks" in the first place and fatalities resulting from them; most deaths following an attack are presently blood loss and/or drowning (with heavy correlation between the two) not continued interest and feeding response from the shark. They're not preying on us, they're wondering what the hell we are or mistaking us for a seal and quickly realizing their mistake. It's not really the sharks' fault the closest approximation to our hands they have available more closely resemble a bear trap.
I think swimming around and feeling a whole human shark hand grab your leg might be more psychologically damaging than a bite would ever be
"They have no hands, but still must grab"
Iconic
Edit: also, For me it's the eyes and the fact they usually just eat part of you and then leave that make shark attacks weirdly terrifying. Lots and lots of things can attack and eat chunks of my delicious human flesh, and would like... ACTUALLY eat me. but sharks have the coldest, deadest spooky eyes and would just float up from the abyss to take a few ribs as a souvenir and vanish. it just makes the idea of an attack more unsettling. Ugh
This was my thought exactly. Most attacks are them just being curious and having no way to explore that curiosity other than to gently nibble at the object of their curiosity with their massive crushing jaws and rows of cutting teeth. I feel like sharks having an alternate, and substantially less lethal, method of exploring their curiosity would be very beneficial to the subjects of their curiosity.
So what you're saying is that hand sharks would actually be much less dangerous? We need to get on this. How we get hands on these sharks?
I agree but also counterpoint: I don't want a shark to grab me with human hands either, no matter how harmless it would be
I too feel like a Bull Shark's saline adaptability is unreasonable.
They're _already_ sharks, one of nature's (most nearly) perfect organisms adapted about as well as they can be for predatory life in an oceanic habitat; how much more evolutionary advantage do they really need?
@@TehFrenchy29just enough to keep us all on our toes 😂
Plus they are the only type of shark to actually want to eat humans, the other people-attacking sharks are typically outliers or starving, but bull sharks actually like eating people
@@oliviavanbrink now I want to feed my enemies to a bull shark 😍
@@oliviavanbrinkwhat kind of pervert shark wants to eat people, not buying this at all.
The way Jaida thought of the term "Wetris" without even missing a beat -- Superb! Both videos I've seen with her this week have been really enjoyable. Although she's extremely busy working on her PhD, she's exactly the kind of person who will be able to inspire kids to study science, so I hope she will be seen on SciShow and other platforms as often as possible.
Imagine if you were being circled by a shark, and then it popped up and waved at you with its human hands
hehe waved
I don't know how ancient sheepshead or pacu are as species, but I love the idea of them being like "Ahem, I think you'll find YOU ALL HAVE SHEEPSHEAD FISH TEETH."
Hooray, Jaida's back! Catfish ditch day. Wetris. Anadromous. My brain is going to tuck these away to put on repeat when i least expect 😂.
Loved this q&a. I think though sharks with hands would just look like they were jazzhandsing all the time?!
Soup montage is the correct choice of what to fill the visuals gap with there at the end.
The discussion of the fish sensory system/hearing was super interesting! Imagine fish complexly
This is my ideal content, if there's a way to sponsor having the greens put out videos just talking with people nerdy about their fields, I would donate so much money
Specifically an enthusiastic generalist answering questions with a specialist is the best
new and improved catfish question - what if you took every known species of "fish" that we consider as being "catfish" and ranked them according to the length of their adult forms and then put one of each into the car, then how far into the list would you go?
In what order? I feel like ordering them smallest to biggest would get you further in than Vice versa. However if you stuff the big fish in first, there's probably going to be room for the small fish between them. How whole do they have to be? And I am sure there's all sorts of variables I'm not taking into account
If you like animals that are named based on the way they look, Australia has lots. Although one downside is that you might think someone is talking about a specific species, when they're actually just describing the animal, or vice versa. Which could make a big difference, especially when it comes to something venomous. Different antivenom is needed for different snake bites, so it's important to to know if someone was bitten by a Brown Snake (for example), or if it was a snake that just happened to be brown, but that may or may not be a Brown Snake.
16:00 "Imagine Hands on a dog" Raccoons a re a bit like that. And they are super cute!
3:30 that was my first thought too Hank! Ana and cata made me think of anodes/cathodes or like you said anions/cations too. A quick google suggests that the ana/cata dichotomy means upward/downward, and the -dromous means "running", so anadromous fish run (swim) up(stream) to spawn, while catadromous fish run (swim) down(stream) to spawn.
Love the ending with stock videos about soup :)
Sharks with hands would be terrifying 😭
I think dolphins with hands may be scarier
Facts.
@@SuperKiobi13 I can’t get that image out of my head now
But then they could give me hugs. The sharks. I don't want dolphins
@@LoonerFlight valid
I think Jadia is awesome.. I love her enthusiasm. Fish are cool!
New definition to "carp-pool"??
Hank, sometimes your best looks different every day. That's one thing I've had to learn with multiple chronic illnesses.
I had no idea that’s why neti pots work when snorting like pool water hurts!!
It certainly explained why I have had no success with them and clearly need to measure for real if I ever try again 😅
I’m so glad I know Jaida Elcock exists now because everything I’ve seen her in is so exactly the kind of stuff I love. I’ve learned so many wild things in such a short time
I now want "Catfish Car Tetris" to be a thing :0
With those shirts in the thumbnail it'd be false advertising to not have bad fish puns in this video. It's what I'm here for.
“I also have the slavish awareness of a walnut” 🤣😂 2:37
Spacial.
Please never stop doing these omg
Great nerd chemistry between the two of you! Fun video
"their best" I love how she loves sharks as mich as I do (probably more)
Hank, I've started a playlist of 15 minute videos to watch while walking on my treadmill and I just gotta say thank you for hankschannel putting out almost exactly that length bangers. the playlist is like 50% you so far lol
Yaaaaay more Jaida!!
I reckon all we need is the average volume of a catfish, simple as that. If they average x mass, then we can easily convert that to volume and figure out how many can fit in any vehicle!
For the sake of simplicity of course we'd imagine all catfish are spherical.
No no no spheres don't pack as efficiently! We can totally model the catfish as cuboids though
This is adorable. Subbed to Jaida
10:37 this is called an “umwelt”, a term coined by the german baltic animal scientist named Jakob Johann Freiherr von Uexküll. very important theory in ethology!
that's funny. Umwelt just means environment in german lol
She seems awesome. So glad you guys connected.
Loving this new collab duo
Really love the talk about naming animals after people. Bird names for birds is a great move, and I’m glad we have Hank and Jaida on the team.
I'd love to listen to a full episode of Dear Hank & Jaida sometime..
I am never unseeing the shark from the thumbnail. It MUST LIVE ON FOREVER!!!
Nobody:
Sharks with hands:
"run the fade myboy"
Carp-pooling
The barn owl was probably so happy when we finally came around and made barns
Holy crap someone needs to tell NorthOfTheBorder to make the hand shark, he totally would. He's made things that really aren't even that far off.
More of this please. I'm late diagnosed ASD, and this stuff is the conversation happening in my mind. I wish we were friends... You folks are my people. Lol
awesome video! As a fish disease scientist, I really love to hear fish talk! :)
@9:30 ... "Can Fish hear as well as humans in air?" -- It depends on the fish! ... I mean ..some fish echo locate like bats so,.... yeah!
13:56 hank showing off that eons knowledge
0:57 intrusive thought
Jaida Elcock seems like she could be everyone's BFF. What a delightful person!!!!!!!!
Love the banter between Hank & Jaida.
Jaida's great! Also, Emily Graslie shoutout!
Hearing _Hank Green_ say he's never been this busy in his life is a bit terrifying.
A video I didn't know I needed. ❤ So fun. So much greatness.
I think you would first run into a weight issue rather than a size issue when trying to fill a vehicle with flesh. "Average catfish" apparently weighs about 20kg. "Average car" rated capacity is about 400kg. I know there is no such thing as an average catfish or average car but those are the first results to come up so I'm gonna roll with them. I guess that means 20 assuming they are both "average", whatever that means, and assuming you don't want to overload the vehicle. Also assuming you aren't driving the vehicle, so if you were I guess about 16 or so.
Collin Furze is up to the task
Hank, please do this as a monthly thing, with not just Jaida but other enthusiastic experts.
5:20 - this explains SO MUCH... I could never understand how people could use neti-pots when even getting a little water up my nose in the shower or pool totally freaks me out. I may actually be able to try this now...
I feel like Hank is usually THE MOST excited about stuff but Jaida's love of all things fish out does him this time and it's fun to see him confused about how someone can think all fish are just that cool/awesome/cute when he's usually on the other side of the equation 😂😂
The problem with naming things after what they look like is that similarity in looks does not correlate well with shared an ancestry and you end up with weird situations like the elephant shrew being more closely related to elephants than to shrews.
I have never laughed at fish facts so hard.
omg there's more of u 2 together 🥺❤
My favorite fish that's doing its best will always be the male Japanese puffer fish trying to attract a mate. What awesome nest building design❣
Can Jaida stick around please? I love her energy and her knowledge oh so much
I actually have an answer to the ice cube question, shown to me by my dentist. We chew with the back teeth and it puts extra pressure on them. He showed me a visualization of that, and that's about when I agreed to invisalign to stop the habit.
More Jaida videos!!
Just going through university molecular biology and on top of everything else that is fabulous in this video THANK YOU so much for examples of osmosis/hypertonic/hypotonic 🥰🥰🥰
"'cause we're fish"
Love this conversations!
I love Hank and Jaida together!
Love, love, love Jaida!
Hank finally found the superior fish being
underrated comment right here
@@spark_matter thx
Car Pool?
Carpool?
Carp Pool?
Okay but the fish-related shirts... yes 👕🐠
I have an axolotl, and when I clean out his tank, I remove him from the tank and put him in a separate tank to minimize the stress that he goes through. My axolotl tank has a net that acts as a hammock for him to chill on. Sometimes I relocate this hammock net to a different spot in the tank. When I put him back in the tank after relocating the hammock net, he will swim directly towards it and lay on it. How does he know where it is at? Axolotl’s are blind.
Axolotls aren't completely blind, they just have very poor eyesight.
@15:00 hank have u not seen what humans have done 😂😅
thank you hank ❤
More Jaida plz
Sharks with hands so they can use sign language and terrify us with “shark tales”.
That was not an expected thumbnail. I can’t under it!
Sharks with hands? You mean...
SUPERIOR FISH BEINGS!!??????
hand dog is over, the debate is now face cat and hand shark
Have you seen how small the holes are that they lay their eggs in? Some can be a suprisingly small and cramped area for one to fit into, let alone two huge catfish at the same time. My point being you would probably be quite suprised at how many would accually fit.
In a van
Emily Graslie shoutout!! Miss the early days of The Brain Scoop, love seeing her pop up now and again
She is possibly the greatest science thing I've seen since Brain Scoop. I'd watch that collab just to see what kind of earring game they bring.
I love this discussion, I am working on a writing project that includes aliens and there are things discussed here that I probably would've overlooked normally, specifically HOW we sense things that we just take for granted, that part broke my brain lol.
i love this colab please do more
5:08 “dont do this” *immediately provides more detailed instruction*
This got me in the mood for soup
5:10 I had to do sinus rinses at one point due to an infection causing huge issues. I very much wondered why you were supposed to add salt to the water (but was too miserablr to look it up).
If a shark had hands, it would give a moose a muffin.
"I don't understand why it's not okay for us to chew ice cubes" made me pause in my actively chewing of ice cubes... for about 2 seconds, because nothing can stop me from chewing ice cubes.
My pet fish definitely can sense vibrations- had to move our blender bc it was too close to my fish and was scaring them! And they will come around and wait for me at the corner of the tank when i walk around in the morning, bc they know the rumble means im coming and they will go "food!!"
I have not tested this extensively but i think they can differentiate my typical "about to feed" steps and other steps- when my roommates walk by they will not wait for them and if im super stressed or excited and moving around quicker they wont wait for me at all
I feel like the ice thing, at least as I heard it, was more specifically for if you have fillings because the filling is made of a different material than your teeth and thus contracts in response to cold at a different rate than your tooth and it can weaken or break the filling. I might be wrong, that's just what I remember hearing. Someone ask their dentist!