Dolphins can swim at speeds up to 25 miles per hour when they are in a hurry, although they usually swim at speeds of 7 to 8 miles per hour
Dolphins tend to live up to 20 years according to some research. However in some occasions, dolphins have lived up to 48 years
During the gestation period, dolphins carry their calves for 11 to 18 months depending on the species
Dolphins live up to 40 years although the average is 25 years.
According to some sources, there are 42 species of dolphins which belong to the family delphinade of oceanic dolphins.