What is animal adaptation?

Animals adjust themselves in their habitat by making the body structure suitable according to their environment. This adjustment of the animals in their environment is known as animal adaptation.
Types of animal adaptation:

(1) Aquatic adaptation
(2) Terrestrial adaptation
(1) Aquatic adaptation: Adjustment of animals in the aquatic habitat by modifying certain structures of their body is known as aquatic adaptation. The structures or features which help them to adjust themselves in aquatic habitat are known as the adaptational features or adaptational structures.
     Following adaptational structures or adaptational features are found int the body of aquatic animals

- Body is streamlined in shape which enable them to live in aquatic habitat
- Fins as the main locomotory organs in aquatic habitat. Fins are also of the different types. They are dorsal fins, ventral fins caudal fins. There are paired fins also which are known as the pectoral fins and the pelvic fins.
The fins help them in swimming mode of life but the caudal fin helps them in balancing the body in water and also for changing the direction while swimming.
Gills- as the respiratory organs are also the adaptational structures which help the aquatic animals to breathe in oxygen the oxygen which is dissolved in water. Such aquatic animals which have gills as the respiratory organs are perfectly adapted in aquaticc mode of life.