Bicolored Bristlemouth

View data on Catalog of Fishes here.

body elongate; mouth large, premaxillary teeth uneven with at least one tooth, usually the fourth, greatly enlarged; vomer with teeth. Pseudobranch absent. Meristic data (eastern North Atlantic only): gillrakers on first arch 23–24 (22–25), 4–5 on hypobranchial; no raker in articulation of epi- and ceratobranchial; branchiostegal rays 14 (15), (5) 6 on epihyal. Dorsal-fin rays 12–14; pectoral finrays 9–11; pelvic finrays 6; Anal-fin rays 17–18; dorsal and anal fin origins about opposite; last dorsal and Anal-fin rays not split to base; adipose fin absent; anus closer to pelvic bases than to anal fin origin. Vertebrae 31(32–33). Pyloric caecae 4. Scales present. Photophores SO absent, ORB 1, OP 2, BR 10 11, IV 3 + 10; VAV 5, 2 (3) anterior to genital opening; AC 14–15, 2–3 between last anal and first procurrent ray; OA 8; supra-caudal gland weakly but distinctly developed, reticulum extending less distinctly anteriorly, along either side of dorsal base, to dorsal origin; infra-caudal gland similar but confined to procurrent ray. Color of light to dark brown, with transparent area anterior to anal origin; gular area white; dorsal and Anal-fin rays pigmented; meningeal pigment extends forwards to at least level of posterior margin of eye, often anterior to pineal body; internasal area pigmented.

oceanic, deep mesopelagic, precise depth range dependent upon developmental stage, latitude; juveniles and adults centred at 400–1,000 m, sometimes occurring deeper; 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.

dioecious.

male to 48 mm; female to 70 mm SL.

circumglobal, subtropical- tropical, occurring in small numbers throughout Clofnam area to about 61° N; absent in Mediterranean

no data.

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).

Ostracods and pleuromammid copepods were dominant food (Ref. 51904).

Dorsal spines (total): 0; Dorsal soft rays (total): 12 - 15; Analspines: 0; Analsoft rays: 16 - 19

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).

fisheries: of no interest

廣泛分布印度-太平洋及大西洋之熱帶至溫帶海域之。台灣海域紀錄深度約695-3257公尺。

背鰭軟條數：13(12-15);臀鰭軟條數：18(16-19);胸鰭條數：10(9-10),腹鰭軟條數：6;第一鰓弓之鰓耙數：上枝 8(8~9) +中間2 +下枝13(9-12) = 23(21-24);脊椎骨數：28;發光器排列：SO 0; BR 9-11; IV 12(12-13); VAV 5(4-5); AC 15(15-16); IC 32(32-34); OA 9(8-9);第一鰓弓之上枝與下枝之間連接點具2條鰓耙，第一鰓弓之鰓瓣下方略寬。體色：身體呈灰色至暗褐色。背鰭、臀鰭鰭膜透明或鰭膜基部具深色色素斑。腹部呈黑褐色。

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

LaHave Bank, Nova Scotia to the Caribbean

nektonic

Epipelagic

Mesopelagic

Bathypelagic