Redfin Shiner Lythrurus umbratilis
This species was found at 10 bioassessment sites, 1 rapid fish bioassessment site, 0 fisheries assessment sites, and 4 fisheries presence-only assessment sites. In total, it was collected at 15 distinct sites, or 1.1% of the 1350 total sites monitored by the bioassessment program. It is the 95th most commonly collected species.
The Redfin Shiner was collected in 13 bioassessment sampling sessions and 0 fisheries assessment sessions. It was present in 1 rapid bioassessment session and 4 presence-only sessions.
The biological assessment program has collected a total of 21 individual Redfin Shiner specimens, ranking it the #113 most collected fish.
Terete and strongly compressed laterally. The back is bluish-silvery with more silver on the sides, and white beneath. Spawning males become bright steel-blue on the back, fins redden, and tubercles develop on the head. There is a prominent black spot at the frontal base of the dorsal fin which extends into the first few rays. A terminal mouth is slightly oblique and no barbel is present. Hooked pharyngeal teeth on slender arches are arranged in a formula of 2, 4-4, 2. The complete lateral line may have 40 to 48 scales, and it is strongly de-curved. Dorsal and pelvic fins have 8 rays, while the pectoral fins has 12 or 13 rays, and the anal fin has 11 rays.