D 18; A 16; P1 17; P2 8; GR on lower arch 106; Scutes 20+14=34.
HL 26.3% of SL; ED 4.5; BD 24.8; SN 7.2; IO 4.9; UJ 11.4; CP 6.9; P1L 15.0; P2L 8.2; DH 11.7; AH 4.5.
Body elongate and slightly compressed, its depth 4.0 in SL. Snout moderate, about half of postorbital length. Eye covered with thick adipose eyelid. Head rather large, about 3.8 in SL. Mouth oblique, end of maxmilla extending below anterior margin of pupil. Minute teeth on posterior margin of upper jaw. No teeth on lower jaw, vomer palatines. Pseudobranchiae well developed. Gill-rakers with fine serrations; its length longest at middle, becoming shorter on both ends on lower arch and longest at angle, becoming shorter on distal edge on upper arch. Underneath of free edge of gill-cover with developed dermal flap in front of pectoral fin base. Dorsal fin at about middle of body, its origin at middle between snout and caudal fin base. Pectoral fin situated ventrally just behind gill-cover. Pelvic fin small, about half of pectoral fin, situated below two-thirds of dorsal fin base. Length between pectoral fin origin and pelvic fin origin nearly equal to pelvic fin origin to anal fin origin. Caudal fin weakly forked. Scales cycloid and deciduous. Feebly keeled scutes with well developed round bases. Body dark blue dorsally and silvery white ventrally. Fins translucent.
Distribution:
Chilean Patagonia, also known from the Straits of Magellan (Menni, Ringuelet and Aramburu, 1984).
Remarks:
Very common around Talcahuano, central Chile (Norman, 1937a). Bahamonde and Pequeño (1975) recognized subspecies, C. b. bentincki Norman and C. b. cuga de Buen in Chile.