It also makes it easier to find food. Whales are always migrating. They travel to find food, breed and have young. Whales do not have eyelids. They rely on thick oily tears to protect their eyes.
Whales hear from little holes behind their eyes.
Whales talk to each other by making high pitched sounds like whistles, clicks, squeaks, rattles, and groans. To help protect the whales from extinction please DO NOT throw nets, fishing lures, or other fishing gear ocean. But dolphins come much closer to the shore. They will come as close to the shore as you or I can walk without going under water. Dolphins have teeth.