How marlin breathe?

Marlin, like other fish, breathe by extracting oxygen from water using their gills. Water enters their mouth, flows over the gill membranes, and the oxygen is absorbed into the bloodstream while carbon dioxide is expelled. They can also use a mechanism called buccal pumping to help draw water over their gills, ensuring efficient respiration even when swimming slowly. Additionally, marlin are known for their high activity levels, which require them to have a highly efficient respiratory system.