Answer to Question #119900 in English for Shania kumar

Question

Discuss some structural and physiological adaptations of fishes which make them most successful inhabitants of the aquatic environment.

Answer 1

They have scales to protect them from parasites and predators. Also, the scales are overlapping to reduce friction with water.

They have a stream-lined body to reduce resistance as they swim.

They have gills to draw oxygen from water for the purpose of breathing.

Almost all fish have a swim bladder containing gas which the fish can fill or empty to allow it move up or down the water column.