The matriarch whistles and the pod causes waves to knock seals off of the ice. The hungriest of the pod waits on the other side and grabs them. Then then share the food with each other. This level of coordination is pretty much unheard of in nature. Even dogs aren't this intelligent. Their level of intelligence is somewhat terrifying if you think about it.
https://www.youtube.com/watch?v=g1VEwsI4SlY
And better (but long):
https://www.youtube.com/watch?v=qRWl77tK7Bg