Actinopteri (ray-finned fishes) > Anguilliformes
(Eels and morays) > Congridae
(Conger and garden eels) > Heterocongrinae
Etymology: Heteroconger: Greek, heteros = other + Latin, conger = conger (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; non-migratory; depth range 5 - 50 m (Ref. 90102), usually - m (Ref. ). Tropical; 0°C - ; 30°N - 23°S
Indo-Pacific: Red Sea and East Africa to the Society Islands, north to the Ryukyu and the Ogasawara islands, south to northwestern Australia and New Caledonia; throughout Micronesia (Ref. 1602).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm TL male/unsexed; (Ref. 30874)
soft rays: 273 - 334;
Vertebrae: 163 - 177. Variable but usually two large black spots are obvious; body diameter to about 14 mm (Ref. 48635). Anterior nostrils included in continuous free labial flange. Pectoral fins minute. Total vertebrae 163-177, anal origin below vertebra 59-66.
Often found on sandy slopes below 15 m; withdraws into its burrow when approached. Usually in colonies containing up to several hundred individuals. Feeds on zooplanktons (Ref. 89972).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 25.4 - 29, mean 28 °C (based on 654 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.3 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (31 of 100) .
Nutrients (Ref. 124155
): Calcium = 56.5 [31.7, 97.0] mg/100g ; Iron = 0.742 [0.491, 1.159] mg/100g ; Protein = 19.1 [15.8, 21.7] % ; Omega3 = 0.128 [0.060, 0.324] g/100g ; Selenium = 44.2 [22.5, 81.2] μg/100g ; VitaminA = 63.5 [18.3, 208.7] μg/100g ; Zinc = 1.19 [0.83, 1.69] mg/100g (wet weight);