Mention any four adaptations that help the aquatic animals to survive.
The adaptive features for aquatic animals are:
i. Body of aquatic animals is compressed laterally to reduce friction. This allows swift passage in the water while swimming.
ii. Fins in fish and flippers in whale help in swimming.
iii. Frogs and duck have webbed feet for swimming.
iv. Swim bladder present in certain fish is filled with air and maintains buoyancy.
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