Black Bristlefish

Body dark-brown or black; margin of scale pockets especially dark; area immediately anterior to anal origin densely pigmented and not transparent; peritoneum black, ending above area between 3rd and 4th VAV, usually invisible from the outside (Ref. 559). Gill lamellae free and reduced (Ref. 559).

Oviparous (Ref. 35800).

Dorsal spines (total): 0; Dorsal soft rays (total): 12 - 15; Analspines: 0; Analsoft rays: 17 - 20; Vertebrae: 31 - 33

Meso- to bathypelagic (Ref. 58302). Inhabits deep water and is only captured with special equipment. Lipid content is 4.0 % in fresh body weight and wax ester is 58.4 % in total lipid (Ref. 9193). Protandrous hermaphrodite, oviparous with planktonic eggs and larvae (Ref. 35800).

廣泛分布於北太平洋。台灣附近海域紀錄深度約1175-1255公尺。

背鰭軟條數：13(12-15);臀鰭軟條數：18(17-20);胸鰭條數：9(9-10); 腹鰭軟條數：6; 第一鰓弓之鰓耙數：上枝7(8-9) + 中間2 + 下枝11(11-12) = 20(21-23);脊椎骨數：31-33. 發光器排列: SO 0; BR 8(8-10); IV 13; VAV 6(5); AC 13(14-16); IC 32(32-34); OV 8(7);體色黑褐色；身體具有鱗片狀之格狀紋路，外緣深黑色。所有鰭膜為黑褐色，不呈透明狀。

Cyclothone atraria, commonly known as the deep-water bristlemouth, is a species of ray-finned fish in the genus Cyclothone. It is found in the North Pacific.