Beluga whales defend themselves by blending in with the polar ice caps that they swim near. For example, they often swim by large white chunks of snow in the water to hide from their main predators. They also have superb hearing and distinct voices, so they can call each other for protection. They have strong skin and fins, and their eyes have a protective substance on the cornea.
Beluga whales almost always live in colder areas that have blocks of ice and snow. Their main predators are killer whales and polar bears. They are often able to maneuver around ice caps when they are being chased by predators. Humans are also a large threat to beluga whales. There are many hunters who try to kill beluga whales. Beluga whales are considered to be critically endangered and are protected by the Endangered Species Act.
While humans are a threat to the beluga whales, they are also their protectors. There are many aquariums in North America and Asia that take in beluga whales. The whales are popular among visitors because of their audible noises, bright colors and swift movements.
The worldwide population of beluga whales is terribly low. There are only approximately 150,000 beluga whales left on the entire planet.