Turtles, fish, and frogs live in Central Park.[1] Most of the turtles live in Turtle Pond, and many of these are former pets that were released into the park.[2] The fish are scattered more widely, but they include several freshwater species,[343] such as the snakehead, an invasive species.[344] Catch and release fishing is allowed in the Lake, Pond, and Harlem Meer.[343][345] Central Park is a habitat for two amphibian species: the American bullfrog and the green frog.[346] The park contained snakes in the late 19th century,[347] though Marie Winn, who wrote about wildlife in Central Park, said in a 2008 interview that the snakes had died off.[348]