Ключевые слова: animal, aquatic, biotope, bottom, brackish, brackwater, cernua, cold, deep, discovery, diversity, diving, ecosystem, eurasean, europe, eutrophic, fish, fresh, freshwater, ground, gymnophalus, invasion, invasive, lake, macro, nature, one, pattern, perch, percidae, perciformes, pond, pope, richsee, river, ruffe, scuba, sea, single, small, species, swiss, switzerland, ttersee, underwater, vierwaldst, water, z, zugersee,