The other aspect of their labyrinth organ means some species can across land, on a humid night, to find better waters. It can be classed as 'walking' by use of their pectoral fins.
Dwarf Gourami (Colisa lalai) is suited to a community tank and should be kept in pairs. The male is the more colourful fish. Their natural habitat is in India, Pakistan and often found in the Ganges together with other rivers. They swim in the mid-upper levels and their maximum size is 5cm (2"). They are often prone to disease and water quality needs to be checked together with bullying from other fish.
Golden and Opaline Gourami is tank-bred coloured varieties of Three-Spot Gourami (Trichogaster trichopterus). The fish are hardy and swim in the mid-upper levers of the water. In their natural habitat, Southeast Asia, they grow to a maximum of 10cm (4"). They can be shy but the male can be aggressive when breeding.
The name Kissing Gourami (Helostoma temminckii) comes from the obvious. This is not just part of the mating ritual, but also males deciding who is the 'top dog'. Due to their prominent mouths, they are good at controlling algae. In the wild, Southeast Asia, their size grows to a maximum of 30cm (12"). Needless to say, I have never seen a fish grow to its maximum, yet these need reasonable space. They are happy in a community tank as long as the others are of similar size.
Siamese Fighting Fish (Betta splendens) are often thought to be very aggressive to all fish. The actual fact is the males are aggressive to their own male kind and sometimes the females. Put two males in a small tanks and they will fight until the one dies! Females can be aggressive and once I read a comparison to males, which is the aggressive percentage is 99% for males and 45% for females. I have been told that putting two males in a large tank, set up for them to have their own territory, they will be fine but I have not tried and probably never will. As far as colours, they are generally royal blue or crimson. Albinos are around, but they are not my cup of tea. Their swimming and breeding are interesting. When not in any danger, they meander along. When either defending or showing aggression, their fins flare and they raise their gill covers. In breeding the first part is the bubble nest, which attracts the female. The next is a display by both to the other followed by an embrace under the nest. When done, the female must get out of the area or be taken out by the male. As for breathing, one book I read explained that if they are unable to reach the surface, they are likely to die.
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