4 Problem Invasive Fish and 1 Crustacean

What are the worst invasive fish species? In this video I will be trying to that question and many others you may have about invasive fish species. An invasive species is any plant or animal that has be introduced into an ecosystem where it doesn't belong, normally having negative impacts on native animal and plant species. Invasive fish don't only endanger native fish species but they can also cause millions of dollars worth of damage. Todays video is a little different as I will be going through 4 problem invasive fish species and 1 invasive crustacean.
Attributions
Signal crayfish images:
Andrew Reding
www.flickr.com/photos/seaotter/
J. Maughn
www.flickr.com/photos/jmaughn/
Astacoides
commons.wikimedia.org/w/index...
Creative Commons Attribution-Share Alike 3.0 Unported
Don Loarie
www.flickr.com/photos/loarie/
David Perez
commons.wikimedia.org/wiki/Us...
Creative Commons Attribution 3.0 Unported
Signal Crayfish Footage:
Jarek Andrzejewski
/ @wodnikjarek
razorista
/ @razorista
White clawed crayfish footage:
jmkennedyie
/ @jmkennedyie
Ruffe images:
Christa Rohrbach
www.flickr.com/photos/megaptera/
Tiit Hunt
commons.wikimedia.org/wiki/Us...
Creative Commons Attribution-Share Alike 3.0 Unported
Gilles San Martin
www.flickr.com/photos/sanmartin/
Rawpixel Ltd
www.flickr.com/photos/vintage...
Black bullhead images:
NYS DEC
www.flickr.com/photos/nysdec/
Biodiversity Heritage Library
www.flickr.com/photos/biodivl...
Viv Lynch
www.flickr.com/photos/eskimo_jo/
Jeffdelonge
commons.wikimedia.org/wiki/Us...
Creative Commons Attribution-Share Alike 3.0 Unported
Fishes of Georgia Photo Gallery
www.flickr.com/photos/georgia...
Black Bullhead Footage:
Benjamin Townsend
/ @mrbenjamintownsend
Goldfish images:
Ryutaro Koma
www.flickr.com/photos/clryu/
nymawayca
www.flickr.com/photos/1546073...
veesees
www.flickr.com/photos/veesees/
Dennis Wong
www.flickr.com/photos/dennisw...
geraf
www.flickr.com/photos/geraf/
NYS DEC
www.flickr.com/photos/nysdec/
Cobia images:
NOAA Photo Library
www.flickr.com/photos/noaapho...
WIDTTF
www.flickr.com/photos/widttf/
Smithsonian Environmental Research Center
www.flickr.com/photos/serc_bi...
Cobia footage:
yuckysalad
/ @yuckysalad
MarkPrimo
/ @markprimo
Trout eggs image:
USFWS Mountain-Prairie
www.flickr.com/photos/usfwsmt...
Yellow perch footage:
Lurenet
/ @lurenetfishing
Pike and walleye Images:
NYS DEC
www.flickr.com/photos/nysdec/
lake trout image:
NYS DEC
www.flickr.com/photos/nysdec/
Brown trout image:
NOAA Great Lakes Environmental Research Laboratory
www.flickr.com/photos/noaa_gl...
Red breast sunfish image:
NYS DEC
www.flickr.com/photos/nysdec/
Remora image:
Albert kok
commons.wikimedia.org/wiki/Us...
Creative Commons Attribution-Share Alike 4.0 International
Shortfin Mako Shark footage:
Gonzalo Mucientes
/ @gonzalomucientes
I have adapted and edited some of these original images.
Creative commons licences: creativecommons.org/licenses/
Our first problem invasive fish species is the goldfish. People have been keeping goldfish for thousands of years and since then we have moulded goldfish into many different colours and shapes. The goldfish is a relative of the carps and when released into a river or lake, it can soon take over the ecosystem.
Our next invasive fish species is the Eurasian Ruffe. This small member of the perch family is a small macropredator. The ruffe may not seem like a problem invasive species but it has proven to be so in the great lakes of America. As the ruffe competes with native species and also eats the eggs of other fish.
Our next Invasive species is the signal crayfish. The signal crayfish is a north American crustacean but can now be found over large parts of Europe and japan. If you have seen any videos on my channel before then you would have seen this species as it is in my intro.
Our Forth invasive fish species is the cobia. The cobia is a large ocean fish and is very popular with fishermen as they both taste very nice and put up a good fight. A small number of these fish escaped from a fish farm and are now spreading into the pacific.
Our last invasive fish species is the black bullhead. This medium sized catfish belongs in the waters of north America but is now a problem invasive species across Europe.