Mississippi Silvery Minnow Hybognathus nuchalis
This species was found at 35 bioassessment sites, 1 rapid fish bioassessment site, 5 fisheries assessment sites, and 0 fisheries presence-only assessment sites. In total, it was collected at 40 distinct sites, or 2.6% of the 1513 total sites monitored by the bioassessment program. It is the 72nd most commonly collected species.
The Mississippi Silvery Minnow was collected in 63 bioassessment sampling sessions and 5 fisheries assessment sessions. It was present in 1 rapid bioassessment session and 0 presence-only sessions.
The biological assessment program has collected a total of 3,400 individual Mississippi Silvery Minnow specimens, ranking it the #45 most collected fish.
Elongate and slightly compressed body. The basioccipital process is broad with a concave tip. The snout overhangs the mouth, which has a blade-like lower jaw and is almost horizontal, but lacks a barbel. Pharyngeal teeth have broad grinding surfaces and are arranged in a 4-4 pattern. The complete lateral line has 37 to 30 scales. Dorsal and pelvic fins have 8 rays, while the anal fin may have 8 or 9 rays, and the pectoral fins have 15 or 16 rays. Coloration is pale-yellow to yellow, overlaid with silver on the back and sides, while the belly is white. A faint and dusky lateral line may be present.
HUC12 watersheds where this species has been found