Terrapin

A  is a turtle that lives in or, distinguishing them both from s and from land turtles (including s). In the Teenage Mutant Ninja Turtles multiverse, most incarnations of the Turtles mutated from a species of terrapin (originally the red-eared slider). The Turtles are sometimes referred to as "terrapins" in a florid or poetic sense, as the words "terrapin" tends not to be a casual everyday word in the English language.