Masked grouper (Gracila albomarginata)

General data
- Main name: Masked grouper
- Climates: Tropical
- Habitat: Saltwater
- Native: Africa, Asia, Australia & Oceania
- Distribution: Pacific Ocean, Indian ocean
Classification
- Genus: Gracila - Gracila
- Family: Epinephelidae - Groupers
- Order: Perciformes - Perches
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes
Description
Distribution Indo-Pacific: northern Mozambique to French Polynesia, north to Okinawa, south to the northern Great Barrier Reef. Unknown from the Red Sea and Persian Gulf. Max length : 40 cm TL Dorsal spines (total): 9; Dorsal soft rays (total): 14-16; Anal spines: 3; Anal soft rays: 9 - 10. Readily identified by the white square on their sides, blue in natural light. Differs from all shallow water Micronesian Cephalopholis except C. polleni by having truncate tail. Characterized further by: greenish or reddish brown to brownish grey body color, with several narrow curved dark bars on the midlateral part of the body; dark brown spot midlaterally on the caudal peduncle; 3-5 blue lines across head; oblong body, slightly compressed, depth contained 2.6-3.3 times in SL; width of body 1.8-2.3 times in depth Head smaller compared to other groupers, head length 2.9-3.2 times in SL; evenly convex dorsal head profile; slightly convex interorbital area, width greater than eye diameter; narrow preorbital, depth distinctly less than eye diameter, preorbital depth 10-15 times in HL; rounded preopercle, finely serrate, smooth and fleshy lower edge; ventral edge of subopercle and interopercle smooth; posterior and anterior nostril subequal in size; posterior part of maxilla with hook-shaped or step-like expansion on ventral edge in adults; well developed supramaxilla; pair of small canines at front of jaws; presence of palatine teeth; 2 rows of teeth on midside of lower jaw, inner teeth depressible and twice as long as outer teeth.