They have to adapt to different things. For example, they have to adapt to lack of food (krill mostly) and the change in the ocean ecosystem including the warming of oceans. This is because of excess climate change which is caused mostly by Human activity.
Climate? I don't think there are any seasons underwater.
blue whales can grow by eating everyday but they do not change
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..........
The blue whale is a mammal.