Nile tiger fish. Hydrocynus forskalii. Close-up of head. Okavango river, botswana

tiger fish fishes horizontals river animals horizontal africa underwater forskalii fishes hydrocynus chordata marine fauna sea okavango fish wildlife ocean developing country vertebrates aquatic natural tiger zoology third world head vertebrates backboned botswana nile close up developing countries african osteichthyes rivers characiformes nature botswanan vertebrate animal