Arctic Char, Bull Trout (lat. Salvelinus alpinus)

Arctic Char, Bull Trout (lat. Salvelinus alpinus) – a migratory fish of the Salmonidaefamily. It has intraspecific forms which are different in external appearance, coloring, and way of life. The migratory AC has a tapering head of a conic form, the upper jaw is narrow and quite long with adult species, and the tail-stem is not high. The fish in the sea has a dark-green back with small spots, silvery sides, a white belly, and gray fins. The sides of the body sometimes have white or pink spots. In the river the coloring sometimes changes: the back gets olive-brown, the sides dark brown with silvery hue and numerous red spots, the belly gray and red, and the fins rose-red. In spawning period the fishes acquire special coloring: the body gets darker, the spots brighter, the male’s jaws become longer, and the lower jaw obtains an outgrowth while the upper obtains an indentation fit for the outgrowth. In this period the jaw edges, the belly, and pectoral, abdominal, and proctal fins are...