The structure of the nocturnal migratory complex (MC) of aquatic organisms in some parts of the coastal pelagic zone above gently sloping littoral platform and upper part of the underwater slope at the Western and Eastern shores of Lake Baikal is investigated (depths from 4 to 32 m). Nocturnal MC form the three most numerous groups – benthic amphipods (Amphipoda), pelagic amphipod Macrohectopus branickii and cottoid fishes (Cottoidei), but their proportions in different parts of the lake vary significantly. Five “paintings” in behavior of hydrobionts and in structure of MC are identified and described. The presence and abundance of the main components of the nocturnal migration flocks is influenced primarily by such factors as location relative to the open Baikal, the proximity to river mouths, the effects of underwater currents.