Orcas, the largest dolphins in the sea, subsist on a diet of fish, seals, sea lions, squid and dolphins, and they also eat porpoises and whales. Also called killer whales, orcas are highly social animals that travel in family groups called pods.
Killer whales are apex predators that feed on prey of all sizes, including the blue whale, the largest animal on Earth. Scientists have observed killer whale pods coordinating attacks on their prey. As highly social animals, killer whales travel in pods that are each led by a matriarch. There are three types of pods to which killer whales can belong: resident, transient and offshore, and each pod type has different prey choices.
Resident pods tend to remain in one area, feeding on local fish populations. Transient pods tend to travel over a larger area than resident pods and prey on a wider selection of animals, including other marine mammals. Offshore pods travel beyond the coastal waters frequented by resident and transient killer whale pods and also prey on a wide selection of marine animals. Offshore killer whales also have a preference for eating sharks, and researchers have discovered that biting into shark skin can contribute to excessive tooth wear.Learn More
The blue whale is the largest mammal on earth. This species reaches lengths of 100 feet long and weighs up to 200 tons. The blue whale is believed to be the largest mammal ever to exist on earth.Full Answer >
Walruses are very loud and vocal animals that make an extraordinary range of sounds, including barks, moans, screams, whoops, wails, bellows, growls, snorts, sniffles and knocking sounds. Male walruses also sing complex and lengthy songs during breeding season.Full Answer >
Killer whales, also called orcas, are conceived via sexual reproduction between a sexually mature bull and a cow in estrus. The gestation period is approximately 17 months, at the conclusion of which a calf typically measuring 8 feet long is born to the cow.Full Answer >
Dolphins World cites five possible reasons as to why dolphins jump out of the water: to get a better view over the water, to conserve energy, to play, to get rid of parasites and to communicate with others.Full Answer >