Everyone knows that Orcas are the assholes of the sea.
Only some of them. The transient orca are the ones who eat mammals and don't have large social groupings. The resident orca have larger (matriarchal) social groups and don't eat other mammals , just fish. It's always amazing to me that we have multiple intelligent (how intelligent is uncertain), social species right here on our own planet, and we spend such a tiny fraction of our energies as a society trying to commu…
Both 'transient' and 'type B' eat marine mammals. Some 'type A' chase cetaceans also. The smaller of all 'Type C' eat fishes. Some species mix in a gradient and things can get very complicated. In the end we could have only one or up to nine species of killer whales here.