a hippopotamus submerged in mud, a serene moment

hippopotamus hippo mud water animal wildlife nature mammal africa savanna wetland swamp river lake pond environment habitat wild beast creature fauna photograph large massive calm serene relaxed resting brown dark muddy vegetation plants green tranquil peaceful wildlifephotography naturephotography animalphotography safari africanwildlife powerful herbivore amphibious skin eyes closeup detail muddywater waterhole