fish anatomy

Fish anatomy includes key features like the fins, which help steer and stabilize movement in water; the gills, used for breathing by extracting oxygen from water; and the streamlined body shape that reduces resistance during swimming. Their scales protect and reduce drag, while the lateral line detects vibrations around them. Internally, fish have a heart that pumps blood through a circulatory system, and organs like the stomach, intestines, and kidneys manage digestion and waste. The swim bladder allows them to control their buoyancy, helping them stay at desired depths effortlessly.