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.

Attributions

Mosquitofish images:
J. Maughn
https://www.flickr.com/photos/jmaughn/
David A. Hofmann
https://www.flickr.com/photos/23326361@N04/
Shawn Taylor
https://www.flickr.com/photos/atlnature/
Smithsonian Environmental Research Center
https://www.flickr.com/photos/serc_biodiversity/
schizoform
https://www.flickr.com/photos/schizoform/

Brown trout images:
Tom Hart
https://www.flickr.com/photos/thart2009/
Billy Bob Bain
https://www.flickr.com/photos/astros/
Curtis Fry
https://www.flickr.com/photos/fritography/
NYS DEC
https://www.flickr.com/photos/nysdec/
USFWS Mountain-Prairie
https://www.flickr.com/photos/usfwsmtnprairie/
Michael Meiters
https://www.flickr.com/photos/psychofreakx3/
Grand River Conservation Authority
https://www.flickr.com/photos/grandriverconservation/
Joe
https://www.flickr.com/photos/cmdrgravy/
otama
https://www.flickr.com/photos/otama/
NOAA Great Lakes Environmental Research Laboratory
https://www.flickr.com/photos/noaa_glerl/

Walking catfish images:
budak
https://www.flickr.com/photos/budak/
Kenneth Cole Schneider
https://www.flickr.com/photos/rosyfinch/
Vassil
https://commons.wikimedia.org/wiki/User:Vassil
Wibowo Djatmiko
https://commons.wikimedia.org/wiki/User:Wie146

Northern Snakehead images:
NYS DEC
https://www.flickr.com/photos/nysdec/
harum.koh
https://www.flickr.com/photos/harumkoh/
Smithsonian Environmental Research Center
https://www.flickr.com/photos/serc_biodiversity/
Chesapeake Bay Program
https://www.flickr.com/photos/chesbayprogram/
Brian Gratwicke
https://www.flickr.com/photos/briangratwicke/

Bowfin images:
NYS DEC
https://www.flickr.com/photos/nysdec/
Petroglyph
https://www.flickr.com/photos/28113115@N00/

Common Pleco images:
Jean-Francois Brousseau
https://www.flickr.com/photos/phrakt/
Bishoy Zak
https://www.flickr.com/photos/bishoy_zak/
Kenneth Cole Schneider
https://www.flickr.com/photos/rosyfinch/
Denis Delannoy
https://commons.wikimedia.org/w/index.php?title=User:Denis_Delannoy&action=edit&redlink=1

Walking catfish Footage:
vladeb
https://www.flickr.com/photos/28122162@N04/

Mosquitofish footage:
dangerousfishbowl
https://www.youtube.com/channel/UCYAnjH9OaGKjEE7BN5orsRA

Brown trout footage:
jmkennedyie
https://www.youtube.com/channel/UCJKIWnhFH_9SIyfYt0UqrKA
Simon Greenwood
https://www.youtube.com/channel/UCAjmTdFlARFS5tgpQv7Ynxg

banded galaxias image:
Nga Manu Images NZ
https://www.flickr.com/photos/129662450@N02/

Florida flag fish image:
CheepShot
https://www.flickr.com/photos/23755697@N04/

Our first problem invasive fish species is the mosquitofish. the mosquitofish was originally native to the southern united states and Mexico but has now been introduced into many other countries around the world. They were originally imported to help combat the spread of malaria but have now become a problem species to get rid off.

Our next invasive fish species is the brown trout. Many people see the brown trout as a positive fish to have in an ecosystem as they're a popular food fish and they are also very popular with fishermen. The brown trout was originally native to continents in the united states but has since been introduced into the southern hemisphere when it continues to threaten vulnerable species of fish such as the new Zealand native galaxiids.

Our next Invasive fish species is the walking catfish. The walking catfish is originally native to south east Asia but has since been introduced into places such as the USA. The walking catfish is a particular problem as its able to move from one water source to the other by "walking" across land.

Our Forth invasive fish species is the northern snakehead. The northern snakehead is a tough hardy predatory fish and because of this it can have a huge impact on an ecosystem where it doesn't belong. One of the reasons why it has had such an impact in the US is because it can survive in cold water and it is also a great parent.

Our last invasive fish species is the common pleco. The common pleco is originally native to south America but has become a notorious invasive species all thanks to the aquarium trade. Plecos are often sold while they are small but of course grow very large. The common pleco is a particular problem in Florida as they pester manatees and erode river banks.

What do you think is the worst invasive fish species?
Let me know in the comments below?