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Blue & Killer are 2.
There have been no major changes in the killer whale's environment, and they are not an endangered species.
YesSpotted dolphins do have enemies : Killer whales and big sharks such as the Blue, Greenland, Riff, Hammerhead, The great white, and the mako sharks.
Killer whales can be useful in many ways to protect the ecosystem. They can naturally manage fish population naturally instead of relying on trawlers catching them which not only disturbs other wild life as bycatch but causes pollution. Another way is that similar to actual whales, their poo can help by enabling plants to photosynthesis the carbon and produce oxygen which can increase the oxygen levels in water if their was a sustainable population of orcas.
Killer whales are known to eat sharks and seals. Seals form a major part of their diet.
on the ice of course lol they live all around antarctica
About 125 known major oil spills.
Most dolphins eat small aquatic animals such as fish. However, the largest dolphin, which is inaccurately called the killer whale, hunte larger prey. In fact, killer whales are a major predator of seals.
ateherosclerosis in major sysems affected
Man is the killer whales major enemy. Man has been hunting the whale for a long time and has reduced their numbers. Man hunts the whale for sport, meat, and blubber. Japan is the largest whale hunter region in the world and will readily harpoon one.
Preparedness and prevention