Pod of hippopotamus mostly submerged in Okavango Delta's golden light

pod hippopotamus hippo african submerged evening golden golden light botswana okavango okavango delta artiodactyla hippopotamus amphibius ivory kubu pachyderm pachydermata pfuvu poaching target seekooi dangerous jumbo heavy grazer raft silent endangered intelligent highly social lives in water feeds at night africa wildlife water wild river nature wilderness aquatic big mouth safari large outdoor herbivore aggressive