Bristlemouth

View data on Catalog of Fishes here.

body fairly elongate; mouth large; premaxillary teeth even; vomer with teeth. Pseudobranch absent. Meristic data (eastern North Atlantic only): gillrakers on first arch 18–20, 4 on hypobranchial; no raker in articulation of epi- and ceratobranchial; gill filaments fused basally in broad segment shape along hypobranchial; branchiostegal rays 13 (14), 6 on epihyal. Dorsal-fin rays 13–14; pectoral finrays 9–10; pelvic finrays 6; Anal-fin rays 19–20; last dorsal and Anal-fin rays not split to base, dorsal adipose fin absent; anus close to pelvic fin bases. Pyloric caeca 4. Vertebrae 32 (31–33). Scales present. Photophores SO absent, ORB 1, OP 2, BR 10, IV 3 + 10; VAV 5, two anterior to genital opening; AC 14, 1(2) between last anal and first procurrent rays; OA 8; opercular gland inconspicuous; pre-caudal glands weakly developed, confined to procurrent rays. Color of whitish ground colour, epaxial brownish, diffuse pigmentation; brown pigment conspicuous between anal pterygiophores; membrane between posteriormost branchiostegal rays with scattering of punctate melanophores; meningeal pigment comprised dorsoanteriorly of many punctate melanophores.

oceanic, mesopelagic, precise depth range dependent upon developmental stage, latitude, season; juveniles and adults in 300 900 m depth; no diel vertical migrations.

Grey, 1964: 185.

Badcock J. 1984. Gonostomatidae. pp. 284–301. In: P.J.P. Whitehead MLB, J.-C. Hureau, J. Nielsen, and E. Tortonese editor. Fishes of the Northeastern Atlantic and the Mediterranean. Paris: Unesco. p 1473 pp.

dioeclous.

male to 43 mm, female to 58 mm SL.

circumglobal; tropical in North Atlantic but sampled in Clofnam area in small numbers to about 61° N; absent in Mediterranean.

no data.

Oviparous (Ref. 35800).

Oceanic, precise depth range dependent upon developmental stage, latitude, season (Ref. 4769). No apparent vertical migration observed (Ref. 4463). Feeds primarily on calanoid copepods (Ref. 51904).

Dorsal spines (total): 0; Dorsal soft rays (total): 12 - 15; Analspines: 0; Analsoft rays: 17 - 21; Vertebrae: 29 - 34

Light to dark brown in color (Ref. 3991). Branchiostegal rays: 14.

Meso- to bathypelagic (Ref. 58302). Oceanic, precise depth range dependent upon developmental stage, latitude, season (Ref. 4769). No apparent vertical migration observed (Ref. 4463). Lipid content is 4.3 % in fresh body weight and wax ester is 53.5 % in total lipids (Ref. 9193). Oviparous, with planktonic eggs and larvae (Ref. 35800). Minimum depth from Ref. 58018.

fisheries: of no interest

Cyclothone pseudopallida, commonly known as the slender bristlemouth, is a species of ray-finned fish in the genus Cyclothone.

circumglobal

Occasionally found in Canadian Atlantic waters. Found at depths of 300 -1400 m.

nektonic

Epipelagic

Mesopelagic