Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Anguilliformes
(Eels and morays) > Ophichthidae
(Snake eels) > Ophichthinae
Etymology: Apterichtus: From the Greek ??????? (apteron), without fins, and ????? (ichtus, more correctly written ichthys;
masculine), fish.; jeffwilliamsi: Named for Jeffrey T. Williams (National Museum of Natural History, USNM).
Environment: milieu / climate zone / depth range / distribution range
Marine; benthopelagic; depth range 4 - 16 m (Ref. 101270). Tropical
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Western Central Pacific: Vanuatu.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 30.5 cm TL (female)
Morphology | Morphometrics
Vertebrae: 138 - 142. This species is distinguished by the following by the following characters: tail 1.7-1.8, head 13-16, and body depth 65-73 in total length; preopercular pores 4, supratemporal canal with 5-9 pores; teeth conical, uniserial on jaws and vomer; and with a single vomerine tooth; anterior nostril non-tubular, a hole; snout is sharp, slope approximately 30° relative to underside;
body colouration pinkish white, with numerous brown to orange spots that are less than eye diameter; MVF 58-140, total vertebrae 138-142 (Ref. 101270).
Captured over a rippled sand bottom. The largest female specimen (30.5 cm TL) was with ripened eggs, 0.7-0.9 mm in diameter (Ref. 101270).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
McCosker, J.E. and Y. Hibino, 2015. A review of the finless snake eels of the genus Apterichtus (Anguilliformes: Ophichthidae), with the description of five new species. Zootaxa 3941(1):49-78. (Ref. 101270)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.8 ±0.6 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (23 of 100) .