Incredible Dolphin Moments Planet Earth

A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae, Platanistidae, Iniidae, Pontoporiidae, and the extinct Lipotidae.
There are 40 extant species named as dolphins

There are currently 42 species of dolphins and seven species of porpoises.
Dolphins are marine mammals.
A dolphin pregnancy last between nine and 16 months.
Dolphins eat fish, squid and crustaceans. .
All dolphins have conical-shaped teeth.
The orca (killer whale) is the largest dolphin.