TED-ED: Why are blue whales so enormous? - Asha de Vos

The video explores the immense size of blue whales, which are the largest animals to have ever existed. Their size is largely due to their diet of krill and their efficient lunge feeding strategy. Despite their massive size, blue whales have small esophagi, limiting their diet to krill. The ocean's buoyancy supports their size, unlike land animals like elephants. However, the energy demands of lunge feeding limit their maximum size to about 33 meters. The video highlights the evolutionary adaptations that allow blue whales to thrive on krill, emphasizing the saying, 'You are what you eat.'

Why is it said that blue whales are not designed to feed on anything larger than krill?

What evolutionary adaptations have blue whales developed due to their diet?

What are the implications of the statement 'You are what you eat' in the context of blue whales?