Wiktionary
river turtle
n. Any marine turtle that inhabits rivers.
Usage examples of "river turtle".
But, like the river turtle, this band of crawlers could not retract their over-large heads.
I had heard it said that the inspiration for his looks came from an ancient river turtle of South America, but this of course could not be, for Miplip had been created eons before either the turtle or the river in which, until Judgment Day, the creature had made its home.