Paradise Fish (Macropodus opercularis)
Paradise fish are a species of freshwater fish found in ditches and paddy fields of East Asia.
Paradise fish were one of the first ornamental fishes available to western aquarium keepers, being imported into Europe as early as the 19th century. This is attributed to their hardy nature and attractive colouration.
Like other labyrinth fish, they are able to breathe atmospheric air, which allows them to survive in a variety of water qualities.They are also tolerant of a wide range of temperatures, as their natural range lies from the Korean peninsula to northern Vietnam.
André Karwath via Wikimedia Commons