No, but they do eat other whales. Not dolphins though, that's cannibalism.
The orca is not a whale, but is in the dolphin family. Of actual whales two are truly carnivorous: the sperm whale and the narwhal.
Orcas will eat seals, and seals are mammals.
Orcas are predators, meat eaters. They'll eat whatever they can and like.
yes they can or tiger sharks eat baby orcas anyways
No.
NO.
Nothing. Orcas eat everything-they are the top of the food chain!
No. There are two different types of orcas. Residents eat only fish, transients will eat other marine mammals.
They don't.
yes
they eat krill
yes
They don't. Orcas - Killer whales are toothed whales, and don't deliberately eat anything as small as plankton.