Celebrated on April 14th
It has been proven by scientists that dolphins give themselves names. They develop their own individual whistles and they recognize theirs and other dolphins' names. They sleep with only half their brain When they are asleep, one part of their brain remains alert and awake. This keeps them safe from potential predators, and enables them to breathe while sleeping.
It has been researched that dolphins are "re-entrants" and actually lived on land before adapting to the water. When studying their fins, scientists have found that they are actually formed like legs and toes. So maybe our closest sea friends were wolf-like land animals once.
Dolphins enjoy catching and surfing waves like humans do. Scientists have not yet understood why dolphins jump out of the water - some of them leap over 20 feet in the air.