Why are whales and dolphins called mammals?
Whales are mammals which means that, like humans and other land mammals, they have three inner ear bones and hair, they breathe air, and the females produce milk through mammary glands and suckle their young.
Why are dolphins not fish but mammals?
Dolphins Breath Through Lungs
Dolphins have lungs just like humans. Most other sea life has gills which they use the motion of the water to breathe. Fish extract oxygen from the water and don’t need to surface. With dolphins having lungs they have to come up for air about every 8 to 10 minutes.
Is a whale a fish or a mammal?
Whales, dolphins and porpoises, are all mammals – just like us! Mammals breathe air. Just like humans, whales and dolphins breathe oxygen out of the atmosphere. This means that they have nostrils (we call them blowholes) which connect to a pair of lungs.