Many gouramis have an elongated, feeler-like ray at the front of each of their pelvic fins. As labyrinth fish, they will often swim near the top of the tank. As with other tropical freshwater fish, an aquarium heater is often used. Gouramis will eat either prepared or live foods. Some species can grow quite large, and are unsuitable for the general hobbyist.
Generally regarded as peaceful, gouramis are still capable of harassing or killing smaller or long-finned fish. Depending on the species, adult and juvenile males have been known to spar with one another. Aggression can also occur as a result of overcrowding.
~6.0 – 7.0