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They have a layer of fat, or blubber, under the skin to keep warm in the cold water. Dolphins are widespread. Most species prefer the warm waters of the tropic zones, but some, such as the right whale dolphin, prefer colder climates. Dolphins feed largely on fish and squid, but a few, such as the orca, feed on large mammals such as seals.
Individual members then take turns plowing through the ball, feeding on the stunned fish. Corralling is a method where dolphins chase fish into shallow water to catch them more easily. Orca and bottlenose dolphins have also been known to drive their prey onto a beach to feed on it, a behavior known as beach or strand feeding. Some species also ...
The spinner dolphin feeds mainly on small mesopelagic fish, squids, and sergestid shrimps, and will dive 200–300 m to feed on them. [14] Spinner dolphins of Hawaii are nocturnal feeders and forage in deep scattering layers, which contain many species. The dwarf spinner dolphin may feed mostly on benthic fish in reefs and shallow water. [7]
The adult striped dolphin eats fish, squid, octopus, krill, and other crustaceans. Mediterranean striped dolphins seem to prey primarily on cephalopods (50-100% of stomach contents), while northeastern Atlantic striped dolphins most often prey on fish, frequently cod. They mainly feed on cephalopods, crustaceans, and bony fishes.
It is also unique in having the smallest genitalia of any open sea dolphin. The species feeds on pelagic fish, squid and shrimp found some distance below the surface of the water (200 m/660 ft to 500 m/1,600 ft). Virtually no sunlight penetrates this depth, so feeding is carried out using echolocation alone.
There are two types of feeding behaviours: skim-feeding and lunge-feeding, [64]: 367–386 but some species do both depending on the type and amount of food. Lunge-feeders feed primarily on euphausiids (krill), though some smaller lunge feeders (e.g. minke whales) also prey on schools of fish. [66]
Scientists determined that bottlenose dolphins found close to the shore off South Carolina and much of the east coast are a different species than those living in deeper water, according to a ...
These dolphins mainly eat fish that live near reefs, in estuaries, and on the ocean floor. [ 9 ] [ 10 ] A study from 1983 examining the stomachs of 17 humpback dolphins found that glassnosed anchovy ( Thryssa vitrirostris ) was the most common prey, followed by ribbon fish ( Trichiurus lepturus ), olive grunter ( Pomadasys olivaceum ), and ...