fish under water. arapaima fish - pirarucu arapaima gigas one largest freshwater fish. fish in the aquarium behind glass.

fish arapaima underwater pirarucu arapaimidae gigas water diving fishes ancient scuba nature swim actinopterygii aquarium swimming fishing reef exotic dive background tropical sea predator essequibo osteoglossiformes sudis river ocean animal marine blue coral green wildlife aquatic beautiful life natural color fauna deep freshwater wild colorful snorkeling