Animals that live in water, usually called aquatic animals, include fish, cetaceans, certain types of turtles and other reptiles, and amphibians. There are also a number of semiaquatic animals, such as alligators, hippopotamuses and penguins, that depend on and live in water most of the time.Know More
Animals depend on water for a variety of reasons. For fish and many other aquatic animals, water is necessary for breathing. Cetaceans, like whales and dolphins, breathe air but need water for support and locomotion. When taken out of the water, these creatures are slowly crushed by their own weight and eventually die.
Semiaquatic animals that primarily live in water depend on it for cooling down, locomotion, food, protection or some combination of these. For example, hippopotamuses are excellent swimmers, though they lumber on land and eat aquatic plants and land vegetation. Hippos are always in the water when the day is hottest, and when land predators come around, they can dive or swim away to escape.
Amphibians and a few fish, like the peculiar walking catfish, are technically aquatic but can survive on land or in water. Amphibians have a completely aquatic youth, hatching from eggs in water and growing up as fish-like tadpoles, but they later develop limbs and lungs and live a more land-based life. Walking catfish and similar species have developed lungs or lung-like structures to cope with low-oxygen water and can come out on land to migrate to other ponds when necessary.Learn more about Marine Life
Animal life from the topmost to the lowest oceanic zone ranges from sharks and other fish to deep-sea squid and echinoderms such as the sea pig and sea cucumber. The oceanic or pelagic zone has every form of animal life that lives away from the coastal regions.Full Answer >
Scientists believe that there are over 1 million species of animals and plants living in the ocean. Some speculate that there are 9 million species that have not yet been discovered.Full Answer >
The sublittoral zone is home to anemones, crabs, sea stars and coral. The sublittoral zone is another name for the deepest region of the intertidal zone.Full Answer >
There are literally millions of animals that live in coral reefs and that live around the reefs, but a few specific species of animals that live in coral reefs are corals, clams, sponges, sea horses and certain types of fish. Sea turtles, lobsters and other species like to live near coral reefs and depend on them for survival.Full Answer >