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?
Fish don't have eyelids, so they can't close their eyes to sleep like humans do. They don't have a specific sleep time and don't enter a deep sleep state. Instead, they rest by slowing down their metabolism and reducing activity. This resting state can occur at any time during the ...
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...
Fish are cold-blooded creatures, and most of them cannot control their internal temperature, like humans. In order to stay at a healthy temperature, or obtain temperature homeostasis, the fish seek warmer or colder water. Some fish also have additional mechanisms to keep a healthy temperature. H...
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might migrate to the bottom of a lake where the temperature’s stable, then sleep off the worst of the February blues. Opah are warm-blooded, but they still roam the oceans following their ideal conditions. Winter underwater is tough, and fish need every trick in the book to stay alive....
Fish can nibble on the plants. They hide among the plants and sleep.The plants need light. Most-fish need light, too.The tank may be put near a window. It will get light there. A window may let cold air in. The water in the tank may get too cold. ②The fish may die because ...
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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...
Some Fish make their own sleeping bags. They make a big spit bubble and sleep inside it. The bubble keeps them in one place all night. It also keeps other animals from smelling them. If an animal bumps the bubble, the fish swings away, ...