The Whale does not belong to Class Pisces. It belongs to the class Mammalia.
Features of Pisces
- They are exclusively water living animals and include the fishes.
- Their skin is covered with scales/plates.
- They obtain oxygen dissolved in water by using gills.
- Their body is streamlined, and a muscular tail is used for movement.
- They are cold-blooded and their hearts have only two chambers.
- They lay eggs.