Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Haemulidae
(Grunts) > Plectorhinchinae
Etymology: Diagramma: Greek, diagramma = mark out by lines (Ref. 45335); melanacrum: From the Greek melanos meaning black, and akros meaning tip or at the end - in reference to the black outer part of anal and pelvic fins and lower part of caudal fin (Ref. 44143). More on author: Randall.
Environment / Climate / Range
Marine; benthopelagic; depth range 3 - 40 m (Ref. 90102). Tropical
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 45.0 cm SL male/unsexed; (Ref. 48635)
(total): 10 - 11;
soft rays: 6 - 7. Tubed lateral line scales 55-57; outer row of teeth in jaws slightly enlarged, movable; swim bladder with 3 short anterior projections; third or fourth dorsal spine longest, 1.8-1.9 in head; first dorsal spine 1.7-2.3 in length of second; interspinous membrane of dorsal fin not incised; pelvic fins reaching vent or slightly beyond, 1.2-1.3 in head; body light yellow dorsally, shading to pale silvery grey on sides and ventrally, with numerous small dark brown spots, which are smaller and form oblique rows on body below lateral line; head light purplish grey with numerous small dark brown spots, opercular membrane black; dorsal fin and upper 3/4 of caudal fin with small dark spots; lower 1/4 of caudal fin black; anal and pelvic fins mainly black (Ref. 44143); dorsal and caudal fins mainly yellow, caudal fin with broad black lower edge margin, caudal fin may be slightly emarginate to truncate; body depth 2.4-2.6 in SL (Ref. 90102). Juveniles from 13.3 cm SL with spots about size of pupil on head, body, dorsal and caudal fins becoming progressively smaller and more numerous with age; juveniles and subadults up to 25.4 cm SL with narrow discontinuous wavy lines on operculum and cheeks, extending to about level of anterior margin of eye (with lines breaking up into spots in larger specimens) (Ref. 44143). Large juveniles have spots in longitudinal rows and also solid stripes (Ref. 90102).
Western Central Pacific: Indonesia, Borneo and the Philippines. Also known from Ashmore Reef in the Timor Sea.
Juveniles in estuaries and silty reefs on open substrates with remote outcrops or reef or debris. Adults on deep reefs along walls with large caves. Often in small aggregations in depths of 30 m or more (Ref. 48635).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Johnson, J.W., J.E. Randall and S.F. Chenoweth, 2001. Diagramma melanacrum new species of haemulid fish from Indonesia, Borneo and the Philippines with a generic review. Mem. Queensl. Mus. 46(2):657-676. (Ref. 44143)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00560 - 0.02463), b=3.02 (2.84 - 3.20), based on LWR estimates for this Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.6 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (51 of 100) .