Mammal
Blue whale
The blue whale is a mammal, not a fish. It breathes air.
Photo by NOAA Photo Library. Public domain · Source
Unusual but true
A blue whale is the biggest animal that has ever lived. Its tongue can weigh about as much as an elephant.
Where it lives
Blue whales live in oceans around the world.
What it eats
A blue whale eats tiny animals called krill.
How big
Longer than two school buses. The biggest animal on Earth.
Places: Ocean
Blue whales are endangered.