Why Whales are Not Grouped in Fishes
Whales are not grouped in fishes due to four main reasons. Whales are warm-blooded animals while fishes are cold-blooded. Whales give birth to live young while fishes lay eggs. Whales have mammary glands to feed their young while fishes do not have. Whales have four chambers in their heart while fishes have two. Therefore, whales are classified under a separate class called mammals.
Key Areas Covered 1.What are the Characteristics of Fish