Why is the blue whale able to exist despite its size?

The blue whale can exist despite its enormous size due to its efficient feeding mechanism and specialized Biology. It primarily consumes small shrimp-like creatures called krill, which it filters through baleen plates, allowing it to obtain sufficient nutrients without needing to chase large prey. Additionally, its large body supports a slow metabolism, enabling it to thrive on the relatively low energy intake from its diet. Furthermore, its size offers advantages such as reduced predation risk and the ability to travel long distances in search of food.