Give two example of adaptation that fish have to living in a water?

1. Gills: Fish have gills that allow them to extract oxygen from water. Gills are thin, feathery structures that are located on the sides of the fish's head. Water passes over the gills, and the oxygen in the water is absorbed into the fish's bloodstream.

2. Swim bladder: Many fish have a swim bladder, which is a gas-filled sac that helps them to control their buoyancy. The swim bladder can be filled or deflated with gas, which allows the fish to rise or sink in the water.