Ключевые слова: actinopterygii, animal, animals, aquarium, atheriniformes, blue, endemic, exotic, fauna, fish, fresh water, fresh water fish, freshwater, freshwater fish, markham, melanotaenia, melanotaenia affinis, melanotaeniidae, natural, nature, new guinea, new guinea rainbowfish, one, one animal, one fish, papua, papua new guinea, rainbow fish, rainbowfish, ramu, river, sepik, swim, swimming, tropical, tropical fish, underwater, water, wild, wild animal, wild life, wildlife,