We've Got River Otters

According to the Flyer,

The lake is a sanctuary of sorts for all kinds of mammals, birds, fish, and assorted creepy-crawlies. Muskrat, beaver, river otter, fox, raccoon, and bobcat all live in or around the lake. Herons and egrets call it home, as well as ducks, bald eagles, and hawks and owls of many stripes. Even the rare troupe of traveling pelicans can be spotted. The lake's biggest fish is the alligator gar, a barracuda-looking monster that can get up to six feet long. There's also the buffalo fish, named for its bison-like hump, a bottom feeder that can reach 30 pounds. Hard to believe, when the average depth of the water is only two to three feet.
Justin Fox Burks

Then there are the snakes.

photo from flickr