The whales often expelled big bursts of bubbles through their blowholes when they were startled. Pairs released bubble streams as they swam side by side—apparently in a spirit of companionship ...

Whales' lungs are particularly efficient at taking up oxygen when they breathe air in and out through their blowholes at the water's surface. Special adaptations help them hold their breath for a long ...

Whales are not fish, so they cannot breathe underwater. Instead, they use the blowholes on the top of their head to breathe air at the ocean's surface. Whales evolved from a deer-like land mammal ...