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Take the Water Bear Quiz!

Water bears live in ocean or fresh water areas, and also “semi-aquatic terrestrial” (limno-terrestrial) environments. If you sample the mosses around your yard, you are likely to find them. Water bears can be found in almost every type of ecosystem around the world, from moss in tropical rain forests to the Antarctic, from the deepest ocean to the highest mountain. They can all be considered aquatic since they must have a film of water surrounding their body to permit gas to be exchanged and prevent uncontrolled drying.

Some water bears exist in environments that experience changes in temperature and water levels, so water bears must be able to survive these changes or they would die. Water bears have the ability to go into cryptobiosis, an extreme form of hibernation, in order to survive the fluctuating conditions in their environment.