Upper-Ob grayling (Thymallus nikolskyi)
This is a long, silver or pinkish fish with small black spots. The scale cover is silver. Numerous small black spots (streaks) are scattered throughout the body. The gill covers are gray with a turquoise hue. From the pectoral to the ventral fins, two parallel yellow-brown stripes are visible. Above the ventral fins there is a large raspberry spot. The pectoral, anal and caudal fins are yellow-orange.the pelvic fins have 5-6 longitudinal oblique cherry red stripes. On the dorsal fin, 4-5 ascending rows of small burgundy red rounded spots with a matte border are visible. The spots of the upper row do not merge with the edge line of the same color. The membranes of the last rays at the fin base are of yellowish-orange hue.