Skimwing

Skimwings also known as tsurak by the Na’vi are powerful, large marine creatures similar to the flying fish of Earth. An indomitable presence above and below the water, the skimwing uses gills while underwater, but breathes air through two nostrils on the top of its head during prolonged flights. With the help of Pandora’s low gravity and high air density, the orange fins of the tsurak unfurl in an accordion-like fashion allowing the skimwing and its rider to glide when above water. While underwater, the fins tuck into its side to form a sleek, torpedo-like shape. Skimwings require high-maintenance and are very picky who rides them, so only the most advance, strong Na’vi riders attempt to tame them.