Fish have three major adaptations that help them to survive in water. They are gills, fins, and a streamlined body.
● Gills
Gills are part of the respiratory system and they help fish take the dissolved oxygen in from the surrounding water.
● Fins
Fins are limb-like structures which help the fish swim and propel their body ahead.
● Streamlined body
Fish have a streamlined body, that is, it’s tapering at ends and bulged at the centre. This
shape helps fish cut through the water and move effortlessly.