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 communicate with them.
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 communicate with them.