Actinopteri (ray-finned fishes) > Anguilliformes
(Eels and morays) > Muraenesocidae
Etymology: Muraenesox: Latin, muraena = morey eel + Esox, old name for pike (Ref. 45335). More on author: Forsskål.
Environment: milieu / climate zone / depth range / distribution range
Marine; freshwater; brackish; demersal; oceanodromous; depth range - 800 m (Ref. 100719), usually - 300 m (Ref. 9942). Subtropical; 0°C - ; 47°N - 4°S, 30°E - 143°E (Ref. 54598)
Indo-West Pacific: Red Sea, Persian Gulf, west coast of India, and Sri Lanka to Fiji and Tuvalu (Ref. 12596), north to Japan and Korea, south to the Arafura Sea (Ref. 9819) and northern Australia. Migrated to the Mediterranean via the Suez Canal (Ref. 6724).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 220 cm TL male/unsexed; (Ref. 559); common length : 80.0 cm TL male/unsexed; (Ref. 3397); max. reported age: 15 years (Ref. 72462)
Vertebrae: 145 - 159. Snout long; eye diameter 2-2.5 times in snout length; posterior nostrils much closer to eyes than to anterior nostrils; mouth very large; teeth generally large and conspicuous (Ref. 4832). Head broader, interorbital about 8 times in head; lateral-line pores before anus 44-47; dorsal-fin rays before anus 66-78; vertebrae 145-159 (Ref. 9830).
Occurs from the littoral zone to the upper bathy-benthic region (Ref. 9942, 11230). Inhabits soft bottoms (Ref. 11230), also found in estuaries. Sometimes enters freshwater environment (Ref. 9987). Feeds on small bottom fishes and crustaceans. Captured and cultured for fishery in Japan. Marketed mainly fresh (Ref. 7238). Also used as bait for shark fishing (Ref. 2872). Also caught by bag (dol) nets. Used in Chinese medicine (Ref. 12166).
Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)
IUCN Red List Status (Ref. 124695)
Threat to humans
Fisheries: highly commercial; aquaculture: commercial; gamefish: yes; bait: occasionally
Estimates based on models
Preferred temperature (Ref. 115969
): 11.6 - 23.2, mean 17.4 °C (based on 401 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00174 - 0.01201), b=3.06 (2.84 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.4 ±0.67 se; based on food items.
Generation time: 5.8 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Tmax=15; K=0.19-0.33; Min Rel Fec=153).
Prior r = 0.57, 95% CL = 0.37 - 0.85, Based on 3 stock assessments.
Vulnerability (Ref. 59153
): High vulnerability (62 of 100) .
Nutrients (Ref. 124155
): Calcium = 53.8 [28.1, 110.5] mg/100g ; Iron = 1.19 [0.71, 2.03] mg/100g ; Protein = 18.8 [16.5, 21.1] % ; Omega3 = 0.624 [0.251, 1.865] g/100g ; Selenium = 57.1 [22.4, 122.9] μg/100g ; VitaminA = 9.67 [2.27, 38.20] μg/100g ; Zinc = 0.576 [0.385, 0.917] mg/100g (wet weight);