The Ribbontail Ray is found in the tropical Indo-Pacific nearshore seas, as well as the waters off islands in the eastern Pacific, are home to the round ribbontail ray (Taeniura meyeni), a species of stingray in the family Dasyatidae. It lives in the bottom of lagoons, estuaries, and reefs, usually between 20 and 60 meters deep. This huge ray, which measures 1.8 meters wide, is distinguished by a thick, rounded pectoral fin disc with little tubercles on top and a comparatively short tail with a deep ventral fin fold. It also has a black tail and an irregular but striking bright and dark speckled pattern on its upper body.

The round ribbontail ray is often nocturnal, solitary or social, and a fierce predator on small benthic molluscs, crustaceans, and bony fishes. It can produce up to seven pups at once. The embryos are supported by yolk and later histotrophic ("uterine milk") secreted by the mother. Despite being non-aggressive, the round ribbontail ray has a poisonous tail spine which is used to defend itself when provoked. Threats to this slow-reproducing species include habitat deterioration throughout much of its range and commercial fishing, both targeted and as bycatch. As a result, it has received a Vulnerable rating from the International Union for Conservation of Nature (IUCN).

The round ribbontail ray is not aggressive and has been known to approach and investigate divers. However, if harassed it can inflict a severe wound with its venomous tail spine. The round ribbontail ray is popular with ecotourist divers because of its size and spectacular appearance.