Brown Trout Salmo trutta
This species was found at 78 bioassessment sites, 5 rapid fish bioassessment sites, 100 fisheries assessment sites, and 3 fisheries presence-only assessment sites. In total, it was collected at 168 distinct sites, or 12.4% of the 1352 total sites monitored by the bioassessment program. It is the 38th most commonly collected species.
The Brown Trout was collected in 179 bioassessment sampling sessions and 274 fisheries assessment sessions. It was present in 5 rapid bioassessment sessions and 3 presence-only sessions.
The biological assessment program has collected a total of 46,252 individual Brown Trout specimens, ranking it the #12 most collected fish.
As its name implies, this trout is generally brown, shading into a background of green and yellow. Spots on the sides are larger and more prominent than on other trout, and they are often bordered with a light-colored "halo". Few, if any, dark spots are found on the tail fin. The leading edge of all belly fins on Brown Trout is yellow or about the same color as the body. Lower portions of young Brown Trout are yellow, fading to gray or white underneath. Males, during the breeding season, often have vivid yellow to reddish-yellow colors along the belly and a sharply hooked lower jaw. The vomer, a bony structure in the roof of the mouth, has sharp teeth in an alternating "zig-zag" row. There are 115 to 150 scales in the lateral line.
HUC12 watersheds where this species has been found