Animals which live in aquatic habitat are adapted by structural modification of the structures of their body and also by developing the new structures. Aquatic animals are adapted by modifying the structures present in their bodies which are known as the adaptational structures or adaptational features. The adaptational features of aquatic animals are as follows:
- Body is stream-lined in shape which helps to minimize water resistance which makes them easy to live in water.
-Respiratory organs are the gills in perfectly aquatic forms like fishes but in the air breathing forms nostrils are located near the top f the head to enable them t go to surface frequently to inhale air.
-Locomotary organs are developed as the fins to swim in water easily. There are different types of fins like dorsal fin, ventral fin, caudal fin, pectoral fins and pelvic fins. All the fins help in swimming but the caudal fin helps them to balance the body in water. Sme aquatic forms like amphibians have the thin fold f skin in between the digits f the hind limbs which are called web. Web helps to increase the surface area for swimming. Aquatic animals like turtles have fin like organs called paddles for swimming and whales have the flippers as the swimming organ.
- Body is covered by scales which make the body soft and slippery so as to escape from the enemies and also helps them to prtect the internal soft organs of the body.
- Some fishes have got the hydrostatic organ called air bladder for adjusting them in the different depths of water according to their need by increasing the amount of gas or by decreasing the amount of gas in side the air bladder.
- Body is stream-lined in shape which helps to minimize water resistance which makes them easy to live in water.
-Respiratory organs are the gills in perfectly aquatic forms like fishes but in the air breathing forms nostrils are located near the top f the head to enable them t go to surface frequently to inhale air.
-Locomotary organs are developed as the fins to swim in water easily. There are different types of fins like dorsal fin, ventral fin, caudal fin, pectoral fins and pelvic fins. All the fins help in swimming but the caudal fin helps them to balance the body in water. Sme aquatic forms like amphibians have the thin fold f skin in between the digits f the hind limbs which are called web. Web helps to increase the surface area for swimming. Aquatic animals like turtles have fin like organs called paddles for swimming and whales have the flippers as the swimming organ.
- Body is covered by scales which make the body soft and slippery so as to escape from the enemies and also helps them to prtect the internal soft organs of the body.
- Some fishes have got the hydrostatic organ called air bladder for adjusting them in the different depths of water according to their need by increasing the amount of gas or by decreasing the amount of gas in side the air bladder.
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