The Teenage Mutant Ninja Turtles (often shortened to TMNT or Ninja Turtles) are a fictional team of four teenage anthropomorphic turtles, who were trained by their anthropomorphic ratsensei in the art of ninjutsu and named after four Renaissance artists. From their residence in the storm sewers of New York City, they humiliate petty criminals, evil overlords, and demonicalien invaders, while remaining isolated from human society-at-large.
The characters initially appeared in comic books before being licensed for toys, cartoons, video games, films, and other merchandise. During the peak of its popularity in the late 1980s through early 1990s, the franchise gained considerable worldwide success and fame.