"The striped dolphin is the largest of the five relatively small dolphins in the genus Stenella
. Shy and wary of boats in some areas of the Pacific, and seen riding the bow waves of boats in other places, these dolphins make long, shallow leaps when porpoising. They also perform a maneuver called ""roto-tailing."" Leaping high, they twist their tails vigorously several times before reentering the water. Large schools of several hundred animals have been seen, but groups of fewer than 200 are more common. There are several kinds of groups. Mature animals, between seven and fifteen years old, form sexually mixed groups and breed. Males then leave and join male-only group while the females go through pregnancy and calving in their own groups. After a year or two, offspring are mature enough to separate from their mothers and join in juvenile schools."
Links:Mammal Species of the WorldClick here for The American Society of Mammalogists species account
Original description: Meyen, F.J.F., 1833. Beiträge sur Zoologie gesammelt auf einer Reise um die Erde Saugethiere, 16:610. Nova Acta Academiae Caesareae Leopoldino-Carolinae, 16:551-610.