The closest might be sharks hunting seals, since they’d have some understanding that seals go to the surface. They might not understand the breathing bit, more just location.
Orcas do something similar, and while that shows more of an understanding of the breathing (since they harass the prey to stop them from surfacing to breathe), but it doesn’t fit the prompt since they’re marine mammals too.
Generally it seems like the mammals are higher up in the pecking (flipper slapping?) order. So if there was a sense of superiority, it might be the other way around
Personally I try to avoid all of them and focus on my urchins…