Rough-toothed dolphin

Scientific Name: Steno bredanensis
Other Names: Slopehead dolphin
Length: 7-8.5 ft. (2.1-2.6 m.)
Weight: 220-330 lbs. (100-150 kg.)
Teeth: 76-110

Named for the rough surface that forms near the crowns of their teeth, these animals are further distinguished by the smooth slope of their faces from the beak to the forehead. Some rough-toothed dolphins have been kept in captivity where their behavior suggests that they possess a greater intelligence than other marine mammals.