Ключевые слова: animal, bed, bottom, breeding, bunch, clear, concern, crammed, cramped, crowd, crystal, deep, ecosystem, environment, environmental, fauna, fish, fishery, fishes, flock, floor, group, herd, huddled, industry, intense, lack, lake, life, lively, living, many, natural, nature, ocean, overcrowded, packed, scuba, sea, seabed, space, sustainability, together, under, underwater, unsustainable, water, wild, wildlife, world,