Answer
Marine animals are in a hypertonic environment; water is constantly being attracted to leave the animal and its cells because of a high salt concentration in the surrounding water. These animals often maintain osmolarity through the diffusion of target solutes to minimize water loss and increase the range of salinity that they can survive in. Some terrestrial animals have adaptations that help them remove salt from their bodies. For example, salt glands of coastal birds help remove excess salt by concentrating and secreting it out of the body.
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