Longnose Dace Rhinichthys cataractae
This species was found at 103 bioassessment sites, 18 rapid fish bioassessment sites, 50 fisheries assessment sites, and 18 fisheries presence-only assessment sites. In total, it was collected at 167 distinct sites, or 11.3% of the 1472 total sites monitored by the bioassessment program. It is the 39th most commonly collected species.
The Longnose Dace was collected in 236 bioassessment sampling sessions and 103 fisheries assessment sessions. It was present in 18 rapid bioassessment sessions and 18 presence-only sessions.
The biological assessment program has collected a total of 13,556 individual Longnose Dace specimens, ranking it the #28 most collected fish.
Olive-green to brown on the back and upper sides shading to white on the belly. Darkened scale pockets give the sides a mottled look, and the lateral band is indistinct in adults. Breeding males are washed with pink on the lower parts of the body. There are 61 to 73 scales in the complete lateral line. Hooked pharyngeal teeth are arranged in a 2, 4-4, 2 pattern, but this formula may vary. The upper jaw and snout greatly overhangs the lower jaw, and a barbel is present at the tip of the maxillary. A silver peritoneum speckled with brown covers the gut cavity, and the air bladder is simple. Dorsal and pelvic fins have 8 rays, while the anal fin has 7 rays, and the pectoral fins have from 13 to 15 rays.
HUC12 watersheds where this species has been found