All animals need water to survive. Land animals will get water by drinking it. Fish and other aquatic animals absorb it through their skin. Animals need shelter for protection. It protects them ...

Amphibians are small vertebrates that need water, or a moist environment ... and carbon dioxide either into or out of the animal. Others fight bacteria or fungal infections.

While all land-dwelling animals breathe oxygen from the air ... Here we’ll look at why fish need oxygen in the water, and how they obtain it from their environment. For fish owners, we ...