Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Labridae
(Wrasses) > Corinae
Etymology: Thalassoma: Greek, thalassa = the sea + Greek, soma = body; the colour of the sea (Ref. 45335).
Environment / Climate / Range
Marine; reef-associated; depth range 1 - 20 m (Ref. 9823), usually 1 - 20 m (Ref. 27115). Subtropical; 24°C - 28°C (Ref. 27115); 30°N - 32°S
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 45.0 cm TL male/unsexed; (Ref. 5450)
soft rays: 11. Adults are identified by the yellow lunate tail. Large males turn blue on the head that grades to green towards the tail (Ref. 48636). Body dark green to blue with vertical red to purplish red lines. Head green to blue with irregular pink to violet bands. Adults with large yellow crescent posteriorly in caudal fin and blue pectoral fins with a large elongate pink area distally. Juveniles with a large dark spot in middle of dorsal fin and a large diffuse black spot at base of caudal fin (Ref 9823).
Indo-Pacific: Red Sea and East Africa (Ref. 4392) to the Line Islands, north to southern Japan, south to Lord Howe Island and northern New Zealand (Ref. 1602). Reported to have formed a hybrid with Thalassoma rueppellii (Ref. 41655).
Occurs solitary or in groups (Ref. 90102) in the upper portions of lagoon and coastal reefs, and in protected seaward reefs (Ref. 1602). Enters estuaries (Ref. 48636). Usually found on upper portions of ledges and heads (Ref. 9710). Feeds mainly on small benthic invertebrates and fish eggs (Ref. 9823). A protogynous hermaphrodite (Ref. 55367).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
A diandric species (Ref. 55367). Length at sex change = 11.0 cm TL, forms leks during breeding (Ref. 55367).
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: minor commercial; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00664 - 0.01652), b=2.96 (2.83 - 3.09), based on LWR estimates for species & Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.37 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (48 of 100) .