Question

Does marine animals breathe except gills. If yes what are the organs and which are such animals?

Answer 1

fish respiration takes place through gills. Lungfish, however, possess one or two lungs.
labyrinth fish have developed a special organ that allows them to take advantage of the oxygen of the air, but is not a true lung.
Mollusks generally possess gills that allow exchange of oxygen from an aqueous environment into the circulatory system.e anatomical structure of the lungs is less complex in reptiles than in mammals, with reptiles lacking the very extensive airway tree structure found in mammalian lungs.
Both the lungs and the skin serve as respiratory organs in amphibians.
aquatic birds have air sacs and hollow bones 4 respiration