catch
air
Because it can get really light so it helps the blue whale swim up for air
It's because the blue whale is a mammal that lives in the water, and needs the oxygen in the air to breathe.
A blue whale is a mammal and needs to come to the surface and breath air. They do not have gills.
The blue whale is a baleen whale.
Blue Whale
The blue whale. Technically the whale shark isn't acually a whale, but in fact the worlds largest fish (shark). The blue whale, also happens to be the largest animal (mammal) on the planet.The blue whale is nearly twice the size of the whale shark, to 90 feet or more.
The blue whale. It is the biggest animal on Earth.
A Blue Whale is a mammal
The biggest type of blue whale is the Alaskan blue whale .
a blue whale is bigger than a eel.
yeah..........