Colony's of whales all survive in an ocean, most are endangered they all are ones without teeth. All of them eat krill or plankton. The most endangered is the right whale.
They need to locate their prey so the use their vocal box and find their prey. They also need to stay in touch with others for danger.
whales survive under the water by swimming in the water and coming up to brethe through its blowhole.
Yes.
Yes, that way they can warn each other for enimies.