What is the distinguishing characteristic of the Anabantoidei species of fish, known as gourames, one of which is the Siamese fighting fish?
They can breathe air The fish have a labyrinth organ which acts like a lung. Most of this species breathe initially with their gills and only develop the labyrinth organs when older. They vary in appearance, behaviour and colour, and are endemic to the fresh waters of Asia and Africa.
In 2002 what, possibly unique, reaction was observed in cichlids, a freshwater fish species, in one short stretch of the River Congo?
