Scientific Name
Nomeus gronovii  
Nomeus gronovii圓鯧
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 NL 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.