Striped dolphin3/16/2023 ![]() Off Japan, where the biology of this species has been best studied, there are 2 calving peaks: 1 in summer, another in winter. Off Japan, there appears to be some age and sex segregation of these large herds. Striped dolphins are fast swimmers, and tend to be more easily alarmed than other tropical dolphins this and their colour pattern have prompted fishermen tocall them “streakers.” Although most herds number between 100 and 500 individuals, striped dolphins sometimes assemble into herds of thousands. Striped dolphins also are generally restricted to oceanic regions, and are seen close to shore only where deep water approaches the coast. Newborns are about 1 m in length.Īlthough also primarily a warm water species, the range of the striped dolphin extends higher into temperate regions than do those of its closest relatives, the spotted and spinner dolphins. Fraser's dolphins also have an eye-to- anus stripe, but are much more robust, with tiny appendages.Īdult striped dolphins are up to 2.6 m long males are slightly larger than females. The mouth contains 40 to 55 small, sharp teeth in each tooth row.Īlthough the body shape is similar to that of other species in the Stenella and Delphinus group, striped dolphins are generally easy to distinguish by their unique colour patterns. There is an eye to flipper stripe and an accessory stripe between the other 2. The black beak sends back a stripe which encircles the eye and then widens and runs back to the anus. A variable light grey spinal blaze extends from the flank area to just under the dorsal fin. The colour pattern is stunning: a white or pinkish belly and dark grey back are separated by a light grey flank. The striped dolphin has the body shape typical of the Stenella and Delphinus species and it is somewhat more robust than spinner and pantropical spotted dolphins, with a falcate dorsal fin and a moderately long beak.
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