The Teenage Mutant Ninja Turtles (TMNT) or just the Ninja Turtles are four anthropomorphic turtles, living in the sewers of New York City and practicing Japanese martial arts and ninjutsu. Their names are Donatello, Leonardo, Michelangelo and Raphael, named after European Renaissance artists. They're guided by an anthropomorphic rat-sensei called Splinter.
Kevin Eastman and Peter Laird cocreated the TMNT in November 1983. It was originally a comic, before TV series, films, videogames and action figures were also produced.