Teleostei (teleosts) > Aulopiformes
(Grinners) > Synodontidae
(Lizardfishes) > Synodontinae
Etymology: Trachinocephalus: Greek, trachys, -eia, -ys = rough + Greek, kephale = head (Ref. 45335).
More on author: Forster.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 0 - 400 m (Ref. 110386), usually 3 - 90 m (Ref. 4472). Tropical; 40°N - 40°S, 76°W - 154°W
Atlantic Ocean: Western Atlantic Ocean from Cape Cod, Massachusetts to Brazil, including Bermuda, Bahamas, Antilles and Gulf of Mexico). Eastern Atlantic from Mauritania to Gabon, including Saint Helena and Ascension Islands.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm TL male/unsexed; (Ref. 5217); max. reported age: 7 years (Ref. 36558)
This species is distinguished from its congeners by the following characters: snout length (LSn) 53.2-117.0% eye diameter (DE), mean 79.1% (vs. mean 40.1% in T. gauguini and 74.8% in T. trachinus); LSn 13.5-27.0% body depth (DB), mean 21.6 (vs. mean 14.7% in T. gauguini); interorbital width 3.4-11.9%, mean 8.9% LH (vs. mean 5.6% in T. gauguini); DE 10.8-21.7% LH, mean 15.7% (vs. mean 16·6% in T. trachinus); length
of the last dorsal-fin ray 7.3-11.6% LS, mean 9·4% (vs. mean 10.1% in T. trachinus and 10.8% in T. gauguini); anal-fin rays 13-16, mode 15 (vs. mode 14 in T. gauguini and 16 in T. trachinus); pectoral-fin rays 11-13, mode 12 (vs. mode 11 in T. gauguini); lateral-line scales 53-60, mode 57 (vs. mode 56 in T. gauguini); predorsal scales 15-20, mode 17 (vs. mode 16 in T. trachinus); further differs from T. gauguini and T. trachinus by deep mitochondrial distances (16.9-17.6 and 15.1-17.8%, respectively) (Ref. 110386).
Rest on or more often burrow into substrate, leaving eyes exposed (Ref. 4472).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Polanco, F.A., P.A. Acero and Betancur-R. R., 2016. No longer a circumtropical species: revision of the lizardfishes in the Trachinocephalus myops species complex, with description of a new species from the Marquesas Islands. J. Fish Biol. 89(2):1302-1323. (Ref. 110386)
IUCN Red List Status (Ref. 126983)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 18.9 - 29, mean 27.3 °C (based on 4584 cells).
Phylogenetic diversity index (Ref. 82804
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00188 - 0.00485), b=3.37 (3.23 - 3.51), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 4.4 ±0.4 se; based on diet studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=1.6; tm=2; tmax=7).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (15 of 100).
Nutrients (Ref. 124155
): Calcium = 34.5 [11.1, 70.8] mg/100g ; Iron = 0.364 [0.127, 0.946] mg/100g ; Protein = 15.4 [12.9, 17.8] % ; Omega3 = 0.0732 [, ] g/100g ; Selenium = 48.8 [18.4, 109.3] μg/100g ; VitaminA = 77.6 [17.7, 284.8] μg/100g ; Zinc = 0.871 [0.520, 1.341] mg/100g (wet weight);