Mobula mobular

Japanese devilray, giant devilray
Characteristic features:

Dorsal surfaces bluish black; 2 crescentic white patches on shoulders most obvious in embryos and juveniles, fading in adults. Ventral surfaces white, sometimes with dark patches in adults.


Attains at least 310 cm DW; males mature at 198–205 cm DW; born at about 85–92 cm DW.


Probably circumglobal in all tropical and warm temperate waters.


A pelagic inshore, offshore and possibly oceanic species, found in coastal regions to well offshore.


Viviparous, with histotrophy; gives birth to a single pup after an unknown gestation period. Feeds primarily on zooplankton (primarily small shrimps), and to a lesser extent small fishes. Occasionally seen by divers but often confused for one of the other larger Mobula species.

Indonesian fisheries:

Very common bycatch of the gillnet fisheries targeting skipjack tuna (Katsuwonus pelamis). Utilised for its gill filter plates (very high value), meat, cartilage and skin.

Similar species:

Mobula tarapacana
Sicklefin Devilray

Mobula tarapacana


Mobula tarapacana differs in having a distinctive bony ridge along the dorsal midline (vs. ridge absent) and dorsal surface uniformly grey (vs. dorsal surface bluish black with 2 crescentic white patches on shoulders).

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