When they need air or just to play sometimes. If it is in an aquarium, they are trained to a whistle and hand commands (movements).
Spinner dolphins are aptly named for their above-water actions. They can leap into the air and make as many as seven complete spins before diving back into the ocean again. In Hawaii, the spotted dolphins can leap higher (we've had them jump high enough to be at eye level to us in a vessel's tuna tower!) than a spinner, but except for the Clymene dolphin, no other dolphins spin
Pink dolphins need water because they are dolphins.
Dolphins live in the sea water, but do not drink it. The ocean water is too salty for the dolphins system to handle.
There are slightly over 30 species of dolphins in the world. Including fresh water dolphins and salt water dolphins.
Dolphins sleep near the surface. They sleep in the water.
They do not seem as active as they normally are and they have a poor appetite.
Dolphins communicate under water by using echolocation
Orcas are faster than dolphins in the water.
Dolphins jump out of the water and spin as a form of play, communication, and social interaction with other dolphins.
Ok for one thing dolphins don't have to be in water! dolphins are mammal.So is the killer whale
River dolphin's
NO, they play with other dolphins.