Whales, dolphins, porpoises, seals, sea lions, manatees, walruses, sea otters, and even the polar bear are considered marine mammals. These animals evolved from various terrestrial ancestors to re-inhabit aquatic environments to differing degrees.  

Turtles, on the other hand, are reptiles, related to lizards, snakes, alligators and the now extinct dinosaurs.  These animals also evolved from land based ancestors to a more aquatic lifestyle taking advantage of the resources of the marine environment.  

Many species of marine mammals and turtles have endured human exploitation for centuries and are currently exposed to threats from man’s activities.  Read More...