Ключевые слова: actinopterygii, animal, animals, aquarium, asia, asian, common rudd, cyprinidae, cypriniformes, europe, european, fauna, fish, fishes, frankfurt, frankfurt am main, frankfurt zoo, freshwater, freshwater fish, freshwater fishes, german, germany, hesse, lake, many, many fishes, natural, nature, person, river, rudd, scardinius, scardinius erythropthalmus, swim, swimming, underwater, visitor, water, wild, wild animal, wild life, wildlife, zoo, zoo frankfurt, zoological garden,