Scientific Name
Lethrinus harak  
Pronounce  
Lethrinus harak單斑龍占魚
by: Wei-Chuan Chiang, Fishery Research Institute
Author (Forsskål, 1775) Depth 5 - 20M
Chinese 單斑龍占魚 Poisonous Fish No 
Family_Chinese 龍占魚科 Economic Fish Yes 
Family F377 Lethrinidae Edible Fish Yes  Chinese In Mainland China 黑點裸頰鯛 
Max Length 50 cm  Aquarium Fish Yes  Common Name 龍尖、龍占、龍占舅(澎湖)、紅龍(澎湖) 
Distribution in World India Ocean to West Pacific Ocean   Distribution in Taiwan East、West、South、PonFu、ShaoLiuChew、Greeb IS.、Tung Sa IS.、Nan Sa IS. 
Habitats Coral、Benthos、Coastal、Lagoon、
Coral&Sand 
Holotype Locality Red Sea 
Synonyms Lethrinus azureus, Lethrinus bleekeri, Lethrinus bonhamensis, Lethrinus johnii, Lethrinus papuensis, Lethrinus rhodopterus, Sciaena harak   
Reference 臺灣魚類誌(沈等, 1993);The Live Marine Resources of the Western Central Pacific, Vol.5(FAO, 2001)  Forsskål, P. 1775 沈世傑 編 Shih-Chieh Shen ed. 1993 
Specimen List ASIZP0055797. ASIZP0055798. ASIZP0060713. ASIZP0063606. ASIZP0074856. FRIP21880. NMMBP02141. NMMSTP00398. NMNSF00820. NTUM00927. NTUM02067. NTUM02069. NTUM07260.  
Common Name Portrait; Thumb print emperor; Thumbprint emperor; Thumb-print emperor; Blackspot emperor; Black-blotch emperor; Emperor 
Redlist Status NL Not in IUCN Redlist     
Characteristic Dorsal-fin rays X, 9; anal-fin rays III, 8; pectoral-fin rays 13. Body depth 2.64 to 2.85 times in standard length. Mouth slightly protractile; lips thick and fleshy. Inner base of pectorals densely covered with scales. Color is olive-green dorsally, paler ventrally; scales on back sometimes with white center. A large elliptical blotch, often broadly edged in yellow, on side directly below lateral line and centered at a vertical near the posterior tip of the pectoral fin. Sometimes light blue dots border the lower rime of the eye and around the nostrils. The pectoral, pelvic, dorsal and anal fins are white to pinkish. The caudal fin is orange or reddish. The vertical fins are sometimes lightly mottled or stripped.
habitats Found solitary or in small schools over shallow sandy, coral rubble, mangroves, lagoons, channel and seagrass areas inshore and adjacent to coral reefs. Feeds on polychaetes, crustaceans, mollusks, echinoderms and small fish. Reported to spawn throughout  
Distribution Indo-West Pacific: Red Sea, East Africa, Seychelles, Maldives, Sri Lanka, Andamans, Indonesia, Philippines, southern Japan, northeast Australia, Papua New Guinea, the Caroline Islands, Solomon Islands, Vanuatu, Fiji, and Samoa. Taiwan: South, Hsiaoliuchi 
Utility Commercial fishery and aquarium species