Question

How do whales differ from fish?

Answer 1

Fish have gills that extract oxygen which allows them to live underwater forever. Whales don't have gills, instead they have one or two blowholes. These blowholes connect to their lungs, which allow them to breathe.

Answer 2

Whales are mammals. Both fish and mammals form two different class of vertebrates.

Step-by-step explanation:

a) Whales are marine mammals which shares some characteristics of mammals and fish both while fish are gill bearing species.

b) Whales are warm-blooded, while majority of fishes are cold-blooded.

c) Whales feed on smaller fishes, and other aquatic animals while fishes feed on larvae, plankton, squid etc.

d) Fishes breathe through gills while whales have blowholes connected to lungs.

e) Whales are able to produce milk but fish cannot produce milk.

f) Whales have bones in their flippers unlike the fish whose flipper is boneless.