Crabs are a kind of animal that we are familiar with. We can often see them moving in the water.Therefore, many people think that crabs can swim and have very high swimming skills.In fact, not, although crabs can move in the water, but when they move must be attached to it.When they walk in the water, they often cling to the surrounding water plants or riverbeds, otherwise they can not move freely.It is not true that crabs can swim, because they can't swim freely in the water like fish and turtles.
As mentioned above, although crabs can't swim, they can attach themselves to other objects and move in the water.Crabs can naturally live in the water, they can not only walk in the water, but also complete a variety of activities.For example, predation is carried out in the water, crabs will take many aquatic animals as their food, small fish and shrimp are the two most common types.
Crabs can live in the water, because they breathe with gills, so they can breathe freely in the water, and all kinds of life activities can also be carried out in the water.However, the gills of crabs are different from those of fish, because the gills of crabs are white filaments, which are more obvious on both sides of their bodies.In fact, crabs can not only live in the water, but also on land for a period of time, their shells and gills can store some water, which can supply them with breathing for a period of time.
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