silver arowana (osteoglossum bicirrhosum).

actinopterygii amazon america american anaconda anacondas animal animals aquarium arawana arawanas arowana arowanas bicirrhosum boidae boinae brazil brazilian eunectes fauna fish fishes fresh freshwater green guianas jungle lake life murinus natural nature one osteoglossidae osteoglossiformes osteoglossinae osteoglossum oyapock rainforest reptile reptiles reptilia river rupununi serpentes silver snake snakes south squamata swim swimming tropical underwater water wild wildlife zoo