You are correct. Here in the Pacific North West, the resident pods are all fish eaters (mainly salmon, of course) while the wandering/vagrant pods predate on pinnipeds (seals and the like).
With the salmon numbers appearing to drop, there is concern for the health and survival of the resident pods.
We’ll see. I’d like more transient whales anyway. I hate it when a seal steals the fish off my line.
It’s amazing the useless knowledge one can amass simply by helping three kids through high school homework.