close-up of barbus denisoni, a large, agile fish with contrasting stripes on its body, swimming underwater. side view of

barbus barb tank puntius water fish aquarium tropical aquatic denisoni river cyprinidae underwater denison line red torpedo asia denisonii amazon freshwater nature fauna wildlife shark blue animal redlined shiny cyprinid green dive tail closeup glowing american animals shoal life pet habitat roseline colorful hobby neon fishes