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Enneapterygius hemimelas  (Kner & Steindachner, 1867)

Halfblack Triplefin
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Native range | All suitable habitat | Point map | Year 2100
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Enneapterygius hemimelas   AquaMaps   Data sources: GBIF OBIS
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Tripterygiidae (Triplefin blennies) > Tripterygiinae
Etymology: Enneapterygius: Greek, ennea = nine times + Greek, pterygion = little fin (Ref. 45335).

Environment / Climate / Range Ecology

Marine; reef-associated; non-migratory; depth range 0 - 30 m (Ref. 13227).   Tropical; 30°N - 15°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Pacific: Japan (Ref. 76833), Ryukyu Islands to eastern Australia, including Mariana, Marshall, Samoan, and Phoenix islands (Kiribati), the Ouvéa Atoll in the Loyalty Islands, to American Samoa.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 4.8 cm SL male/unsexed; (Ref. 54980)

Short description Morphology | Morphometrics

Dorsal spines (total): 15 - 16; Dorsal soft rays (total): 9-10; Anal spines: 1; Anal soft rays: 17 - 19. Males have dark lower head and are abruptly dark posterior, occasionally with alternating broad dark and light bands (Ref. 37816 ). Adults are identified by the greenish tail and the color usually extends well onto the body (Ref. 48636). Mature males with two broad, black bands below third dorsal fin base and caudal peduncle, two bands joined ventrally; posterior half of anal fin black in mature males; caudal fin base white; pectoral and pelvic fins and body orange in mature males (Ref. 76833).

Biology     Glossary (e.g. epibenthic)

Adults are found in various reef habitats (Ref. 48636) especially in reef flats and tidepools (Ref. 90102) and in surf-swept reef margins. Also found in intertidal areas and is usually associated with coralline rock and coral reef lagoons (Ref. 13227). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Fricke, Ronald | Collaborators

Fricke, R., 1994. Tripterygiid fishes of Australia, New Zealand and the southwest Pacific Ocean (Teleostei). Theses Zool. 24:1-585. (Ref. 13227)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: of no interest
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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 27.1 - 29.3, mean 28.7 (based on 1529 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00248 - 0.01216), b=3.08 (2.89 - 3.27), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.2   ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .