Changing places as they form diagonally in a school while dried leaves float to the left, Poropuntius sp

freshwater fish sand neolissochilus hendersoni fish cypriniformes soro brook carp streams neolissochilus soroides hill streams stream freshwater cyprinidae fisheries water jungle stream river actinopterygii aquatic wildlife wildlife sanctuary fins tengas body of water natural world habitat flowing poropuntius huai kha kaeng laos natural habitat mammals scales vietnam cambodia malaysia animals poropuntius normani rapids nature acantopsis choirorhynchos edible thailand mountains tropical waterfalls jungle school current rainforest