Scientific Name	Nomeus gronovii   Pronounce			by: Lab of Fish Ecol. and Evo., BRCAS
Author	(Gmelin, 1789)	Depth	0 - 1000M
Chinese	圓鯧	Poisonous Fish	No
Family_Chinese	圓鯧科	Economic Fish	Yes
Family	F480　Nomeidae	Edible Fish	Yes	Chinese In Mainland China	水母雙鰭鯧
Max Length	39 cm	Aquarium Fish	No	Common Name	水母鯧
Distribution in World	global	Distribution in Taiwan	East、West、South、North、North East、PonFu、ShaoLiuChew、LanI Is.、Nan Sa IS.
Habitats	Deep Sea、Coastal	Holotype Locality	American seas
Synonyms	Eleotris mauritii, Gobius albula, Gobius gronovii, Nomeus dyscritus, Nomeus gronovi, Nomeus maculatus, Nomeus maculosus, Nomeus mauritii, Nomeus oxyurus, Nomeus peronii
Reference	臺灣魚類誌(沈等, 1993)；Fishes of Japan(Nakabo, 2002)  Suda, Y., H. Tachikawa etc. 1986 沈世傑 編 Shih-Chieh Shen ed. 1993 Arturo, A.P. etc. 1994 Nakabo T. 2002 Nakabo T. 2002
Specimen List	ASIZP0076088. NTUM07061.
Common Name	Portuguese man-o'-war; Shepherd fish; Bluebottle fish; Man-of-war fish
Redlist Status	Not in IUCN Redlist
Characteristic	Body elongate. Snout blunt. Mouth small, barely reaching beyond anterior margin of eye; jaws teeth small, in a single series; palatines, vomerine and tongue toothless. First dorsal fin with IX to XI long and fragile spines; second dorsal fin with 23 to 27 soft rays preceded by I or II spines; anal fin with I-II spines and 24 to 29 soft rays, slightly shorter than soft dorsal fin; pectoral fins extending far beyond orgin of anal fin, with 21 to 23 soft rays; caudal fin deeply forked. Scales on cheek not reaching anterior margin of eye. Juveniles whitish or silvery with dark blue mottlings; pelvic fins black. Dark blue above, side silvery with patches of dark blue. Pelvic fin with inner rays joined to abdomen by membrane for its entire length.
habitats	Found offshore in warm waters. Juveniles pelagic in coastal and offshore waters down to at least 30 m, but adults possibly demersal in deep water. Occurs in association with floating Portuguese man-of-war, Physalia, feeding on its tentacles and gonads and
Distribution	Widely distributed in all tropical and temperate seas although unrecorded from the Mediterranean and most of the eastern Atlantic Ocean. It is very rare and sometime found in the coastal Taiwanese waters.
Utility	No commercial value.