There blubber or fat keeps them warm.
It's a special kind of fat called blubber
No. Elephants are land mammals, and whales live in seas and oceans, so they would have no reason to compete against each other.
Yes, they are mammals(including other whales and dolphins).
yes
The big whales as a rule don't eat marine mammals, but Orcas - killer whales - will eat seals, sea lions, and even other whales when they have the chance.
Whales give birth through their vagina, like other mammals.
If we didnt have oceans or seas, there would be no such thing as whales, sharks or other marine animals. But in other cases, oceans aren't that important for other uses in human life.
Besides other mammals, killer whales feed on birds, sea turtles, penguins, reptiles, sharks and octopuses.
Whales use sound waves to talk to other whales in their own language
Yes. All mammals are. Blue whales maintain a core body temperature somewhere between about 36.6 degrees C and 37.2 degrees C (98-99 degrees F). This temperature is similar to that of other large mammals.
No, they eat fish and mammals. They usually hunt in groups called pods.
The reproductive process for Beluga whales is the same as it is for other mammals with the exception that it takes place in the water.