Cyprinidae Key

Index to Inland Fish Species of NB  

1a
Dorsal fin base long, more than 11 soft dorsal rays; dorsal and anal fins each with strong spine, serrated on trailing edge. goldfish

Goldfish, Carassius auratus
1b Dorsal fin base short, fewer than 11 soft dorsal rays (except Acrocheilus alutaceus and Richardsonius balteatus, which may occasionally have 11 rays); no spines in fins.
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2a Premaxillaries not protractile (i.e., no groove across snout in midline). Blacknose Dace, Rhinichthys atratulus
2b Premaxillaries protractile (i.e., with groove across snout) Continue line 3
3a Maxillary with barbel (sometimes concealed in maxillary groove). Continue line 4
3b Maxillary without a barbel. Continue line 5
4a Barbel terminal and slender, at or near end of maxillary; lateral line scales 54-65; no fleshy stays on dorsal aspect of pelvic fins; body sometimes with specialized darkened scales. lakechub
Lake Chub, Couesius plumbeus
4b Barbel in front of posterior end of upper jaw, often hidden in groove above maxillary Continue line 8
5a Lateral line scales more than 55. Continue line 6
5b Lateral line scales 54 or fewer. Continue line 10
6a Peritoneum black; lateral line incomplete; body robust, not noticeably compressed; size small, to about 3 inches (76 mm). Continue line 7
6b Peritoneum silvery or speckled, not black; lateral line complete; body laterally compressed or elongate, and pike-like; size larger, to 3.5 inches (89 mm) or more. Continue line 8
7a Intestine with 2 crosswise coils in addition to main loop; mouth small, terminating distinctly in advance of eye; a dark line, entire or broken, between lateral band and back. redbelly dace
Northern Redbelly Dace, Chrosomus eos
7b Intestine shorter, with single main loop; mouth larger, extending almost to below anterior margin of eye; back uniformly pigmented. Finescale Dace, Chrosomus neogaeus
8a Scales in lateral line fewer than 50; young with distinct mid-lateral black band; each scale with dense pigment anteriorly. fallfish
Fallfish, Semotilus corporalis
8b Scales in lateral line more than 50; scales without black pigment anteriorly. Continue line 9
9a A black spot near anterior base of dorsal fin, sometimes indistinct in young; upper jaw extending to vertical through front of eye; lateral line scales 52- 62; silvery, no distinct spawning colour. chub
Creek Chub, Semotilus atromaculatus

9b
No black spot on dorsal fin; upper jaw not reaching a vertical through front of eye; barbel often small or absent; lateral line scales 65-75; sides often with scattered, darkened scales; spawning males with red on flanks and belly pearledace

Pearl Dace, Semotilus margarita
10a Abdomen behind pelvic fins with a fleshy keel lacking scales; lateral line strongly decurved, following ventral outline of body; anal fin rays 12 or 13. golden shiner
Golden Shiner, Notemigonus crysoleucas
10b Abdomen behind pelvic fins rounded over and scaled; lateral line not strongly decurved; anal fin rays usually less than 12. Continue line 11
11a A dark spot (sometimes faint) at front of dorsal fin, slightly above base; back flattish; first dorsal ray separated by membrane from first well-developed ray; predorsal scales small, crowded. fathead minnow
Fathead Minnow, Pimephales promelas
11b No dark spot at front of dorsal fin above base; back scarcely flattened; first dorsal ray closely attached to first well-developed ray; predorsal scales usually large and distinct. Continue line 12
12a Anal fin rays 9-12 (25% of population may have only 8 rays); origin of dorsal fin over, or in front of, vertical through insertion of pelvic fins; lateral scales twice as high as wide; lower fins of males red during spawning.       common shiner
Common Shiner, Notropis cornutus.
12b Anal fin rays typically 8, sometimes 7; dorsal fin located over or behind a vertical through pelvic insertion;  lateral line complete. black nose shiner
Blacknose Shiner, Notropis heterolepis