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

A) not all whales. Toothed whales eat things like squid.

B) because swimming forward through a cloud of krill with your mouth open is way easier than chasing down and killing something bigger.