Ключевые слова: animal, aquarium, black, black and white, black and white stingray, black stain, brazil, cartilaginous fish, chordate, diving, ecosystem, environment, fantail, fish, glass, lamellibranchia, leopard river stingray, life, nature, ocean, ray, remote, river stingray, shengu river basin, species, stain, stingray, stingray family, swallow stingray, tropical, underwater, vertebrate, water, water lung, white spot, wild, wildlife, zoology,