Teleostei (teleosts) >
Stomiiformes (Lightfishes and dragonfishes) >
Gonostomatidae (Bristlemouths)
Etymology: Cyclothone: Greek, kyklothen, in circle, around (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; depth range 16 - 4663 m (Ref. 58302), usually 600 - 1800 m (Ref. 58302). Deep-water; 61°N - 40°S, 180°W - 180°E
Atlantic, Indian and Pacific: in tropical to temperate waters. Southern Ocean: Indian Ocean sector south of Australia. South China Sea (Ref.74511).
Length at first maturity / Size / Weight / Age
Maturity: Lm 4.3  range ? - ? cm
Max length : 4.8 cm SL male/unsexed; (Ref. 5162); 7.5 cm SL (female)
Dorsal spines (total): 0; Dorsal soft rays (total): 12 - 15; Anal spines: 0; Anal soft rays: 16 - 19. Light to dark brown in color; transparent or slightly pigmented immediately anterior to anal and dorsal origin; median fin rays and internasal area pigmented; meningeal pigment extending to level of rear margin of eye (Ref. 3991).
Body shape (shape guide): elongated.
Meso- to bathypelagic (Ref. 58302). Oceanic, precise depth range dependent upon developmental stage, latitude, season (Ref. 4769). Does not exhibit diel vertical migrations (Ref. 4769). Lipid content is 2.3 % in fresh body weight and wax ester is 34.0 % in total lipids (Ref. 9193).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Gon, O., 1990. Gonostomatidae. p. 116-122. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. 462 p. (Ref. 5162)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
Fisheries: of no interest
Tools
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Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00389 (0.00170 - 0.00889), b=3.00 (2.80 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
3.2 ±0.36 se; based on food items. |
Resilience (Ref. 120179) |
Medium, minimum population doubling time 1.4 - 4.4 years (tm=3.5). |
Fishing Vulnerability (Ref. 59153) |
Moderate vulnerability (35 of 100). 🛈 |