Yes, whales are mammals too.ExplanationWhales are classified as mammals because they share key characteristics with other mammals,Warm-blooded: They maintain a constant body temperature.Breathe air: They use lungs to breathe through a blowhole.Live birth: They give birth to live young instead of laying eggs.Milk production: Mother whales nurse their young with milk.Hair: Although not obvious, they have small amounts of hair, especially when young.Even though they live in water like fish, these traits make whales true mammals.