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Aquatic animals:

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life.

➢ The fish is an excellent example of aquaticanimal.

➢ A fish is any aquatic vertebrate animal that is typically ectothermic, covered with scales.

➢ The fish breathe air or extract its oxygen from that dissolved in water throughspecialised organs called gills.

➢ Fish are abundant in the sea and in fresh water.

➢ Food prepared from fish is also called fish, and it is an important food source for humans.Terrestrial animals:

Terrestrial animals are animals that live predominantly or entirely on land.

➢ Elephants are the most large land mammals in the world.
➢ The elephant's gestationperiod is 22 months, the longest of any land animal.
➢ The elephant is an example of terrestrial animal.
➢ The elephants are a symbol of wisdom in Asian cultures and are famed for their memoryand intelligence.
➢ Healthy adult elephants have no natural predators.

Amphibians:

Are ectothermic animals that metamorphose from a juvenile water-breathing form, to an adultair-breathing form.

➢ Frogs also are an example of amphibians.
➢ Frogs are ccharacterized by long hind legs, a short body, webbed digits, protruding eyes and the absence of a tail.
➢ Frogsare widely known as exceptional jumpers, and many of the anatomical characteristics of frogs, particularly their long, powerful legs, are adaptations to improve jumping performance.
➢ Frogs areoften semi-aquatic or inhabit humid areas, but move easily on land.
➢ The distribution of frogs ranges from tropic to subarctic regions, but most species are found in tropical rainforests.Vertebrates:

Vertebrates are members of the subphylum Vertebrata, chordates with backbones or spinal columns. About 58,000 species of vertebrates have been described.

➢ Sharks are a type...