. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 171 The fish was a subadult male of 332 mm tl, 294 mm fl, 255 mm SL, having lost the spotted and barred juvenile pattern characteristic of Colossoma up to about 150 mm SL and attained the adult coloration, in which the back is silver- black, the underside of the head and anterior belly pinkish-orange (turning silvery after death), and the rest of the body blackish, except for the brownish opercle. The silvery-black back and the
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 171 The fish was a subadult male of 332 mm tl, 294 mm fl, 255 mm SL, having lost the spotted and barred juvenile pattern characteristic of Colossoma up to about 150 mm SL and attained the adult coloration, in which the back is silver- black, the underside of the head and anterior belly pinkish-orange (turning silvery after death), and the rest of the body blackish, except for the brownish opercle. The silvery-black back and the blackish lower flanks are delineated by an irregular "zig-zag" wash (see photo). The greatest body depth is 120 mm (47% of SL), head length 88 mm (34% of SL), orbit 15 mm (17% of head length), predorsal distance 148 mm (58% of SL), preanal distance 185 mm (73% of SL), prepelvic distance 132 mm (52% of SL). There are 90 to 95 scales in the lateral line (about 10 on the caudal base); transverse line about 25 scales from dorsal to lateral line and 24 from lateral line to midbelly; predorsal scales about 47; about 25 midventral serrae to origin of ventrals plus 26 to anus; 8-9 rows of ventral sheath scales. Dorsal iv,14; anal iv,22; pectoral i,17. Teeth in upper jaw in two rows, the 10 in the outer row with an outer incisiform edge, the central teeth with dark tips. The six teeth in the inner row have an inner and outer incisive edge (not so sharp as that of the outer teeth) with a shallow concavity between. (Figure 2) The teeth in the lower jaw total 12 in a single row, becoming progressively smaller and simpler, the center ones incisorlike, the lateral ones becoming conical. (Figure 3) The opercle and subopercle exhibit posteriorly-diverging radiating Figure 2. Head of pacu, showing upper dentition and fleshy, flap-like lower lip. Photograph by Martin R. Please note that these images are extracted from scanned page images that may have been digitally
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Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
