invasive

we dumped a hole bunch of oscars into teh ponds and rivers of IRAQ

Lampreys in the Great Lakes.

Bullfrogs in the western United States. Turns out in the Bayou they're lunch, but when moved out to the west everything else becomes lunch.

Lake trout in Yellowstone, replaces cutthroat trout, now endangered.

Here's one I didn't know about:

http://www.hear.org/AlienSpeciesInHawaii/species/frogs/

Caribbean frogs in Hawaii.

These are the ones I can think of. I know a lot more invasive plant species since I majored in plant biology.

Look for news articles on the Asian Carp in the illinois river. They are a hazard to boaters because they get irritated by the noise of a motor and jump out of the water. Nothing like a 20 pound carp smaking you in the side of the head while your baoting. Back to the ecosystem, there is a great fear that these carp will get into the great lakes and rapidly rewrite the food chain, and general environment of the great lakes. Also check out the zebra mussels, in Lake erie and many ohio lakes, they IMO have done more good than harm but still are uncontrollable, and change the ecosystem of every body of water they are introduced to.

I found this link for my state. Of course... Land of 10,000 lakes... we'd have fish problems!

http://files.dnr.state.mn.us/rlp/regulations/fishing/2002_fishing.pdf

-round goby from Europe
- ruffe from Europe

Both displace native fish and cause grief for local fishermen.

http://www.aquariacentral.com/forums/showthread.php?s=&threadid=29444


theres another thread with a few more bits of info.