When a fish sleeps, it exists in a seemingly listless state in which the fish maintains its balance but moves slowly. If attacked or disturbed, most fish can dart away. A few kinds of fish lie on the bottom to sleep. Most fish do not have eyelids, so they cannot close their eyes to...
Many children like fish because they are cute. But do you know how fish sleep? They sleep at any time during(在……期间) the day or the night. Most fish sleep with their eyes open. They don't have eyelids(眼皮)! So they can't close their eyes! 相关知识点: 试题来源: 解析 They s...
How Do Fish Sleep? Fish sleep by slowing down their movements, brain activity, and breathing while staying motionless (in a suspended-animation-like state) for long periods. Different species of fish portray distinct behaviors while sleeping, but generally, fish drift through the water, change the...
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Whales and dolphins aren't fish. They have to rise to the surface for air. They sleep by resting half the brain at a time. The other half remembers to come up and breathe!词汇 predator /'predato(r)/ n.捕食性动物detect/di'tekt/ v.察觉速记eyelid /'arlid/ n.眼皮still /stil/ adj....
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they hide in a place near rocks or plants so enemies can't get them and the water can't sweep them away.There are, however, many kinds of fish that must swim to breathe. This is true for many sharks,like great white sharks. So how do they sleep if they're always on the move?
This protects them from sea lice and other small biting pests that like to nibble on snoozing fish. Half-Asleep Dolphins are air-breathing mammals that swim in the sea. But how do they sleep? If they stop swimming to take a nap, wo...
Bears hibernate through the winter. They take a long sleep. This helps them live through the cold months. They don't have to worry about finding food. Some animals do the same thing in the summer. They have a summe...
How do you sleep? You probably go to sleep in the evening and wake up hours later, when it's morning. That's how most people sleep. Animals sleep, too. But not all animals sleep the same way. Recently, a study found that chinstrap penguins(帽带企鹅)have one of the most unusual ...