Why is a whale, mammal and not a fish?

Answer:

A whale is a mammal because it has various characteristics of a mammal. These are:

They are warm-blooded. Fishes are cold blooded.
They give live births Most fishes lay eggs.
They feed their young milk from mammary glands. Fishes do not feed their young one's with milk and neither do they have mammary glands.
They breathe air into lungs and need oxygen to survive. Fishes breathe through their gills.
They have hair, although very little. Fishes don't have hair, they have scales.

Category : Mammals

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Animals & Wildlife (Q&A)