Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Scaridae
(Parrotfishes) > Scarinae
Etymology: Cetoscarus: Greek, ketos = a marine monster, whale + Greek, skaros = a fish cited by ancient writers; a parrot fish (Ref. 45335).
This species is endemic to the Red Sea (Ref. 54980:447, species treatment in prep). Correction of data in progress (information transfer to C. ocellatus of the Indo-Pacific).
Environment / Climate / Range
Marine; reef-associated; depth range 1 - 30 m (Ref. 9710), usually 1 - 30 m (Ref. 27115). Tropical; 24°C - 28°C (Ref. 27115); 33°N - 24°S
Length at first maturity / Size / Weight / Age
Maturity: Lm 30.0  range ? - ? cm
Max length : 90.0 cm TL male/unsexed; (Ref. 2871)
Western Indian Ocean: Red Sea..
Occurs in clear lagoon and seaward reefs (Ref. 1602). Juveniles usually solitary; adults form harems (Ref. 9710); males are territorial. Goes to several changes during growth and very large females change sex to the brightly colored male. Small juveniles usually in dense coral and algae habitats (Ref. 48636). Benthic grazer of algae (Ref. 3488). Caught with nets and other types of artisanal gear.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, distinct pairing during breeding (Ref. 205).
Randall, J.E., G.R. Allen and R.C. Steene, 1990. Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
Fisheries: commercial; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278
): 2.0 ±0.00 se; Based on food items.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (tm=5; K=0.255; tmax=21).
Vulnerability (Ref. 59153
): High vulnerability (58 of 100) .