EVERYDAY SCIENCE

Detailed explanation-1: -An aquatic animal is any animal, whether vertebrate or invertebrate, that lives in water for all or most of its lifetime.

Detailed explanation-2: -Hippopotamuses are large, semiaquatic mammals native to sub-Saharan Africa. Although their name comes from the Greek for “river horse”-because of the time they spend in the water-their closest living relatives are whales, dolphins, and pigs.

Detailed explanation-3: -Animals that can survive only in water are known as aquatic animals. Fishes, sharks, etc are examples of aquatic animals.

Detailed explanation-4: -Aquatic animals live in the water and depend on it for survival. There are various groups of aquatic animals including fish, mammals (whales), mollusks (sea snails), cnidarians (jellyfish), and crustaceans (crabs). They either live in fresh water or salt water and can be either vertebrates or invertebrates.

Detailed explanation-5: -Fish are aquatic vertebrate animals that have gills but lack limbs with digits, like fingers or toes. Recall that vertebrates are animals with internal backbones. Most fish are streamlined in their general body form. The word fish is the same whether it is singular or plural-you can talk about one fish or ten fish.