Crawfish

"I caught a crawfish! Don't pinch me!" - City Folk

The crawfish is a type of crustacean found in the Holding Pond between the months of April to the middle of September, found at any time of the day. The "Bugs and Fish" window in City Folk says; "These lobster relatives are known to propagate quickly."

Donating to the Museum
Upon donating the Museum, Blathers will talk about the Crawfish;

"...I don't do particularly well when around crawfish. I mean, really. Look at it. It's like a wretched insect! And those legs... Did you notice all those wiggly legs? All the better to revolt me. Hoo, and the vulgar belly, all segmented and buglike. Absolutely abhorrent!"

It can be found in the middle-left tank in City Folk.

Further Information
The crawfish featured in Animal Crossing (Procambarus clarkii), is a member of one of the three largest freshwater crawfish. There are other names other than crawfish, such as crayfish, crawdads and crawldads known around the world in their respected territories.