arapaima or arapaima or piraruku or puraruku or pace arapaima gigas is a tropical freshwater ray-finned fish from the aravan

actinopterygii amazon america american animal aquarium aquatic arapaima big biology close closeup deep dive diving ecology exotic eye fauna fin fish fresh freshwater gigas head large life natural nature pirarucu predator protected river scale scuba sea snorkeling south swim swimming travel tropic tropical underwater water wild wildlife