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The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body. A cosmopolitan species, it is found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.
The pelagic food web, showing the central involvement of marine microorganisms in how the ocean imports nutrients from and then exports them back to the atmosphere and ocean floor. A marine food web is a food web of marine life. At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton.
Although the crabeater seal is sympatric with the other Antarctic seal species (Weddell, Ross and leopard seals), the specialization on krill minimizes interspecific food competition. Among krill-feeding whales, only blue whales (Balaenoptera musculus) and minke whales (B. acutorostrata) extend their range as far south as the pack ice where the ...
A killer whale was spotted balancing a salmon on its head. It’s not clear what the behavior means, but orcas were observed doing the same thing in the 1980s.
Within a food web, a food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The trophic level of an organism is the number of steps it is from the start of the chain. A food web starts at trophic level 1 with primary producers such as plants, can move to herbivores at level 2, carnivores at level ...
The killer whale pod in Mexico hunts and attacks much larger whale sharks by targeting them from below, a study finds Killer Whales Are Hunting Whale Sharks — the Largest Fish in the World, New ...
The predation of whale calves may be responsible for annual whale migrations to calving grounds in more tropical waters, where the population of killer whales is much lower than in polar waters. Prior to whaling , it is thought that great whales were a major food source; however, after their sharp decline, killer whales have since expanded ...
Delphinoidea is the largest group of toothed whales, including 66 genera in 6 families. The largest living member of the superfamily is the killer whale , which can reach 6 tons , while the smallest is the vaquita .