Photos by Robert Beke of some of the actual fish sold.
All wild-type bettas are expert jumpers, so be sure the aquarium has a tight lid. In addition, they don't like to fight strong water flow. Several species do come from flowing streams, but they chose the slow areas on the stream margins and shelter in vegetation. They will quickly tire if they constantly have to fight against a current.
These fish do best when there is shelter in the form of caves and/or dense plants in sections of the tank where they can retire as needed. If sufficient shelters are provided, they can be kept in groups long-term. If there is inadequate shelter, then a few fish will become dominant and constantly harass the others. These fish are not picky eaters. They will readily accept standard aquarium food, but will benefit from occasional feedings of frozen and/or live foods.
Care Level: Easy
Max Size: 6cm
Tank Size: 50L