Dolphins can hold their breath for. . . Scientists believe that dolphins evolved from. . . Dolphins swim in. . . Dolphins spend their time in small groups of five to seven individuals. The groups come together to play, feed and find mates, then separate.
Dolphins often rejoin a group later, often with different family members or friends.
This pattern of behavior is called. . . When dolphins play they. . . Scientists can identify individual dolphins by size and physical markings such as. . .