Species: Ctenogobius shufeldti, American freshwater goby

Ctenogobius shufeldti (Jordan & Eigenmann, 1887)

American freshwater goby

Elongate, compressed body; snout round; eyes large, towards front, narrow between them; a broad low keel on nape in front of dorsal fin; mouth slightly oblique, opens at front, lower jaw slightly included inside upper jaw when mouth is closed; teeth in several rows on each jaw, inner row of top row much larger, curved, outer teeth slightly enlarged, and recurved in male; lower jaw with large recurved canines in outer mid-lateral row; front of roof of mouth without teeth;  gill rakers short, triangular 0 + 4-5; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VI (none elongate) + I, 11 (rarely 10 or 12); length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 12 (rarely 11 or 13); pectoral fins 17-18; pelvic fins I, 5, fused to form a disc; tail fin long and pointed; body with rough scales, except 7 partly imbedded smooth scales on nape before dorsal fin; 35-40 longitudinal scales; no lateral line.