Actinopteri (ray-finned fishes) > Stomiiformes
(Lightfishes and dragonfishes) > Stomiidae
(Barbeled dragonfishes) > Melanostomiinae
Etymology: Thysanactis: Greek, thysanos = tassel + Greek, aktis = ray (Ref. 45335).
More on authors: Regan & Trewavas.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 100 - 1000 m (Ref. 58302). Deep-water; 18°N - 30°S, 62°W - 150°W
Pacific and Atlantic: in tropical to temperate waters. Eastern Atlantic: common in mid-ocean between 10°N and 5°S, single record at 19°S 5°W and at 30°S 5°E. Western Atlantic: Lesser Antilles to Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 18.0 cm SL male/unsexed; (Ref. 4468)
soft rays: 21 - 25. Body slender. Chin barbel as long as head, pigmented with white spots. Tip of barbel white, small spindle-shaped bulb, minute and rounded terminal body (Ref. 37473).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Gibbs, R.H. and M.A. Barnett, 1990. Melanostomiidae. p. 308-337. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4468)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 8.1 - 17.2, mean 11.1 °C (based on 354 cells).
Phylogenetic diversity index (Ref. 82804
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00121 - 0.00787), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.3 ±0.8 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.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (12 of 100).