Life of Sea | Striped Dolphin (Pseudorca crassidens) | Striped
dolphin or blue-white dolphin is an extensively studied dolphin that is
found in temperate and tropical waters of all oceans of the world. The specific name refers to the characteristic blue and white stripes on the flanks. Striped dolphins occupy both offshore and coastal waters. In some regions, they are usually associated with convergence zones and areas of upwelling. There is a known and well-studied population in the Mediterranean. For
the west coast of North America, they occur far from the coast, in
waters under the influence of the warm, northwardflowing Davidson
Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Subclass: Eutheria Order: Cetacea Suborder: Odontoceti Family: Delphinidae Genus: Stenella Species: S. coeruleoalba
dolphin is the basic shape of the body typical of the Stenella /
Delphinus group, but it is more robust than spinner and pantropical
spotted dolphins. The beak is moderately long, with a clear crease between the melon and beak. The dorsal fin is long and somewhat falcate, and the flippers are recurved and pointed. The flukes are not significantly different from those of others in the genus. Striped
dolphin color is beautiful, a white or pink belly and dark gray dorsal cape are separated by a light gray thorax. A light gray spinal fire extends from the thoracic region of the Cape, to just below the dorsal fin. The mostly-black bill sends a dark stripe, which surrounds the eye and then widens and runs back to the anus. There is an eye-to-flipper stripe and usually a short line between the two other accessory.
the shape of the body is similar to that of other species in the
Steneila / Delphinus group, Striped
dolphins are generally easily
distinguished by their unique color pattern. They are most likely toconfused with common dolphins, but a good look at the color pattern should clear up problems. Fraser's
dolphins have also an eye-to-anus stripe, and therefore can cause some
confusion, but are much more robust, with much smaller appendages. Striped dolphins feed on cephalopods, crustaceans, and bony fishes. Their diet varies by region. Mediterranean
striped dolphins tend to feed on cephalopods and northeastern Atlantic
striped dolphins feed primarily on fish such as cod. They
feed throughout the water column where prey is concentrated and can
dive to a depth of 700 meters to deeper living species to hunt.
dolphins are fast swimmers, and seem to be easier "ghosts" than other tropical dolphins. This and their color pattern led to the fishermen in the eastern tropical Pacific to call them "streakers". They are well known in the ETP is their habit of ships in low "splashy" jumps at high speeds. They are very acrobatic, performing frequent violations and other aerial maneuvers. Often riding bow waves, except in the eastern tropical Pacific, where they tend to run away from ships. Although
most of the Striped
dolphin herds number between several dozen and 500
individuals, these dolphins sometimes assemble into flocks of thousands.
The number ofStriped
dolphinsslainin this wayhas declinedin recent decades, but conflict betweenthe dolphinsand commercialfishing gearremains a problem.Striped
dolphinsare sometimeshunted for theirmeat.Theyare the maintypesdelphinidinvolved insmall cetaceansharpoonand drivefisheries inJapanese waters. Catchvary greatly,butin some yearswere morethan 20,000, but the costswere generallymuch lower.recent years.despitetherecent decline, the populationsarethought tobeseriouslydepleted.This speciesisimmediatelycaught insmaller numbersin the Caribbean, Sri Lanka,and occasionallyinthe Mediterranean.