Dolphins may look like fish, but there really mammals of the sea. Some dolphins look like small whales.
Dolphins are the friendliest mammals in the sea.
Dolphins are very smart and learn tricks easily. Dolphins can swim 30 knots very easily. A common dolphin looks like a black body with white on its belly and yellow lines down to his or her flanks. Another name for the common dolphin is the delpinus delphis. You would find most common dolphins in warm water.