The giant gourami (lat. Osphronemus goramy) is the largest fish from all gourami species kept in tanks. In the wild, it can grow up to 60 cm (24 in) long and even larger, according to some data. In tanks, it grows a bit smaller, about 40-45 cm (18 in), but still, it is a very large fish.
Kissing gourami (lat. Helostoma temminckii) isn’t a very bright colored fish, but it has a very interesting behavior. So, why was this kind named as kissing gourami? They stand in front of each other and swim slowly for some period of time and then for a short time their mouths meet. For observers it looks like kissing.
The pearl gourami (lat. Trichopodus leerii) is one of the most beautiful gourami kinds and a renown tank fish. Just like the rest of climbing perches species the gourami has an interesting peculiarity – they have a special organ, that is called ‘a labyrinth’ due to its complicated shape and the fish use it to breathe with atmospheric air.
Species have gills like all fishes, but they perform an auxiliary function. If you leave the fish without any access to the water surface for a long time, they will suffocate and die.
The paradise fish (lat. Macropodus opercularis) is undemanding, but blusterous and it can attack its tankmates. This small, but very good looking fish has played a role of paramount importance in popularization of aquarium husbandry all over the world.
Paradise fish was one of the first species that were brought to Europe, only goldfishes were the ones that came ahead of it.