Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Ophidiiformes
(Cusk eels) > Bythitidae
(Viviparous brotulas) > Brosmophycinae
Etymology: Alionematichthys: Name from Latin alius meaning the other or different, and nematichthys, the stem of the genus name Dinematichthys, to which this genus is most similar.; ceylonensis: Named for its type locality which is formerly known as Ceylon; an adjective. More on authors: Møller & Schwarzhans.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated. Tropical
Eastern Indian Ocean: Sri Lanka.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.2 cm SL male/unsexed; (Ref. 81230)
Morphology | Morphometrics
soft rays: 57 - 65;
Vertebrae: 41 - 43. This species is distinct in having the following characters: D 75-83 (average 79); A 57-65 (average 60); moderately large eyes (2-2.8%SL); rounded snout, no cirri; only cheeks with scales; no upper preopercular pore; outer pseudoclasper broad-based, triangular, with distal knob on inner side, while the inner one with symmetrically developed anterior pointed lobe and posterior lobe resembling in shape a socket fitting to small knob on inner face of outer pseudoclasper; otolith length to height 2.3-2.4, with shallow dorsal rim; otolith length to sulcus length 1.5-1.6, ostium length to cauda length 3.3-4.0; vertebrae 11-12 + 29-31 = 41-43 (Ref. 81230).
A 5.3 cm SL gravid female (USNM 394975) with 80 embryos, 0.48 cm TL in length, and 60 orange eggs, 0.07 cm in diameter (Ref. 81230).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Møller, P.R. and W. Schwarzhans, 2008. Review of the Dinematichthyini (Teleostei, Bythitidae) of the Indo-west Pacific, Part IV. Dinematichthys and two new genera with descriptions of nine new species. The Beagle 24:87-146. (Ref. 81230)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00179 - 0.01169), b=3.10 (2.87 - 3.33), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153
): Low vulnerability (14 of 100) .