Why do whales eat a huge amount of small fishes instead of a few large ones?

Question

I remember watching a documentary once and learned that whales need to eat tonnes (literally) of krill per day to survive. I don’t understand why this is better than eating small amounts of large fishes instead.

In: 298

Answer 1

Different animals eat different things.

Orcas hunt large fish, including some sharks, and various other animals. To do that you need to find your prey, you need to be fast, intelligent, and hunt in groups.

Blue whales eat krill. They just need to open their mouth and keep swimming. Much easier.