First find of the uvenile specimen of rare lumpsucker species Cyclopteropsis jordani (Cyclopteridae) from the Kara Sea

Abstract

The juvenile specimen of Cyclopteropsis jordani from the Kara Sea was first found and described. According to the trapezoid form of the first dorsal fin, the largest length of its median rays, slightly lateral compression of the body and the number of rays in the dorsal, anal and pectoral fins, the juvenile is classified as Cyclopteropsis jordani. From one-size juvenile of Eumicrotremus derjugini it is distinguished by the complete absence of bone plaques.