Why do killer whales have such long tongues?

From Wikipedia:
Due to its large size, several organs of the blue whale are the largest in the animal kingdom. A blue whale's tongue weighs around 2.7 metric tons (3.0 short tons)[26] and, when fully expanded, its mouth is large enough to hold up to 90 metric tons (99 short tons) of food and water.
A bit more research states:
A Blue Whale's tongue is about the size and weight of a full grown African Elephant.

I'm assuming that a whale's tongue is so big because it needs to eat alot.

LaurenForev <3