Ключевые слова: aquarium, aquatic science, big, bottom, catfish, clarias gariepinus, diving, eating, eats, environment, fin, fish, fishbowl, fishery, fishing, food, freshwater, great, habitat, ichthyology, lake, large, major, meal, natural, nature, pond, river, snag, subsea, swim, tail, undersea, underwater, water,