Reptiles include the eastern garter snake, painted turtle, and northern redbelly snake. It holds Brook Trout, rainbow smelt, golden shiner, Yellow Perch and redbelly dace. The northern redbelly snake gives birth to live young. Young redbelly tilapias feed extensively on tiny crustaceans. Reptile species include the American alligator and Florida redbelly turtle. The redbelly tilapia is an important food fish and sometimes aquacultured. Its common name is Torres redbelly toad, after the type locality. The southern redbelly dace is an important environmental indicator of river and stream health. The northern redbelly dace has thin, flexible rays called "soft-rays". Northern Redbelly Dace were first discovered in the Green River sub-watershed in 1940. Southern redbelly daces have a varied diet, including algae, diatoms, and invertebrates. As typical of "Coptodon", the redbelly tilapia is a substrate spawner and brooder. The northern redbelly dace can be found in cool, quiet, boggy streams and lakes. Unfortunately, the northern redbelly dace is Endangered in several states, one of which is Massachusetts. The southern redbelly dace lives in clear, flowing bodies of water, typically streams and rivers.