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Teleostei (teleosts) > Anguilliformes (Eels and morays) > Muraenidae (Moray eels) > Muraeninae
Etymology: Gymnothorax: Greek, gymnos = naked + Greek, thorax, -akos = breast (Ref. 45335); ypsilon: ypsilon after the 20th letter of the Greek alphabet, in reference to the Y-shaped dark bars often found on this species (Ref. 10659).
More on authors: Hatooka & Randall.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; depth range 110 - 185 m (Ref. 58302). Subtropical

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Pacific Ocean: southern Japan and the Hawaiian Islands.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 89.0 cm TL male/unsexed; (Ref. 35990); 77.6 cm TL (female)

Short description Identification keys | Morphology | Morphometrics

Anal spines: 0; Anal soft rays: 151 - 154; Vertebrae: 141 - 153. A species of Gymnothorax of moderate length. Dorsal fin moderately high, its origin before gill opening. Anus before mid-body. Jaw teeth sharp and uniserial. Body creamy light brown with 26-35 distinct, narrow, dark crossbars extending onto fins (some bars on most specimens Y-shaped). Anterior part of head uniformly light brown. Anal fin with a white margin (Ref. 10659). MVF 5-56-149 (Ref. 35990).

Benthic (Ref. 58302). Minimum depth from Ref. 106682.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Böhlke, E.B. and J.E. Randall, 2000. A review of the moray eels (Anguilliformes: Muraenidae) of the Hawaiian Islands, with descriptions of two new species. Proc. Acad. Nat. Sci. Philad. 150:203-278. (Ref. 35990)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 18 August 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial

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Estimates based on models

Preferred temperature (Ref. 123201): 5.7 - 20.7, mean 15.6 °C (based on 39 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00032 (0.00020 - 0.00051), b=3.24 (3.11 - 3.37), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.1 ±0.7 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): High vulnerability (56 of 100).

Price category (Ref. 80766): Medium.

Gymnothorax ypsilon Hatooka & Randall, 1992