The majority of Baikal sculpins belong to the bottom fish of the Baikal. The whole appearance and behavior of these fish characterize them as bottom dwellers. These small fish are poor swimmers. Their body shape is adapted to live on the ground, among rocks, under which they find shelter. The camouflaging coloration of the sculpins is also adapted to live on the bottom: It is similar to the coloration of the ground. Fish living in the water column, on the contrary, show signs of good swimmers: streamlined body shape and powerful muscles, prominent tail fin. The coloration of most of them is also adapted to their living conditions: they have a darker upper (dorsal) half and a silvery lower (ventral) half of the body. The Baikal lobster fish, an inhabitant of the water column, is peculiar. It differs in its translucent body. This fish is a poor swimmer, and most of the time it seems to "float" on its huge and delicate pectoral fins. Their pelvic fins are not developed. All in all, there are 50 known species of fish in Baikal. Among them, there are endemics, i.e. species found only in Baikal, and species widely spread in fresh waters.
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