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Old Yesterday, 12:12 PM
 
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Quote:
Originally Posted by Zoisite View Post
Resident orcas only feed on local fish, the northern hemisphere residents specialize in salmon because of the high oil content of salmon. If this newly found pod of South American orcas feed on fish then that may back up my guess that they would likely be resident orcas.

Offshore orcas are very deep divers who feed on sharks, sharks also having a very high oil content.

Transient orcas are where the misnomer "killer whale" comes from (orcas are actually the largest of dolphins, they aren't whales). Transient orcas feed on sea mammals - seals, sea lions, porpoises, dolphins, small species of whales. They will also prey on the calves or juveniles of larger species such as grey whales and humpback whales for the youngsters' tongues only.

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I've also found it interesting and misleading that they've ever been called Killer Whales. They should be called Killer Dolphins because that's what they are. But then again, all dolphins are carnivores. The bigger you are, the more choice you have as to what's on your menu.
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Old Today, 02:03 AM
 
Location: on the wind
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Originally Posted by marino760 View Post
I've also found it interesting and misleading that they've ever been called Killer Whales. They should be called Killer Dolphins because that's what they are. But then again, all dolphins are carnivores. The bigger you are, the more choice you have as to what's on your menu.
Well, all whales are technically carnivores...the obvious piscivorous toothed whales, which includes the dolphins, as well as baleen. Most baleen whales pursue smaller schooling fish as well as krill and plankton. The plankton is often bycatch because the krill and fish have swarmed to feed on it, which attracts the whale. Then the whole living mass is captured, water filtered out, and swallowed.
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