Do Whales Have Belly Buttons?: Questions and Answers About Whales and Dolphins (Scholastic Question and Answer Series)
Melvin Berger, Gilda Berger
Provides answers to such questions about various species of whales and dolphins as "Do all whales have teeth?", "How long do most whales live?", "Why do dolphins whistle?", and "Can dolphins save humans?"
slowly than you do. That’s because a whale’s heartbeat gets slower when it dives. A slow heartbeat helps stretch the supply of air. Can whales drown? Yes. Whales drown if water enters their blowholes. This happens when whales get sick, hurt, or tangled up in nets or lines under the sea. If a whale is unable to swim to the surface to breathe, it will die by drowning. Why do whales sometimes get stuck on shore? No one knows for sure. But whales sometimes swim onto a beach and get stranded there.
a cow care for her calf. Brain size is one way scientists measure intelligence. Sperm whales, for example, have the biggest brain of any animal in that size range. This whale’s brain can weigh up to 43 pounds (19.4 kg)—about 15 times as much as the human brain! Whale 14 Do whales swim like fish? No. Whales have two big, flat back fins, called flukes. The flukes are horizontal. Beating the flukes up and down pushes the whales forward in the water. Their two flippers, which are like paddles,
the ice as it breaks up and drifts away. Narwhals move toward shore in summer when the ice starts to melt. They migrate in the fall when the ice starts to build up. Sad to say, many narwhals get trapped by fast-forming ice, and die. 24 Which whale is called “sea canary”? The beluga whale. The beluga sometimes sings or trills like a songbird when it comes up to breathe. But unlike any canary you may know, it also whistles, clicks, growls, and moos. In Russia, a very loud person is said to
spy-hop, or jump straight up out of the water. They probably spy-hop to see farther. You can also tell an orca by its 6-foot-tall (1.8 m) dorsal fin. The pointed fin sticks up out of the water as the orca swims by. The male’s fin is upright and slightly forward. The female’s fin is curved, more like that of a shark. What is an orca’s favorite food? The huge tongue and lips of the giant whales. Orcas are the only whales that eat warmblooded animals. Often hungry orcas tear a seal or walrus apart
the weight of 25 elephants—150 tons (152.4 t); and the height of a two-story building—20 feet (6 m)! Fifty people could stand on its tongue! The heart of the blue whale is also impressive. The size of a small automobile, the heart pumps 7 tons (7.1 t) of blood through the whale’s body. A human could crawl through its main artery. 36 How big is a baby blue whale? VERY! A typical newborn blue whale is about 25 feet (7.5 m) long and weighs some 2 tons (2 t). Quite a baby! The baby blue whale