They are best kept in home aquariums with plenty of live rock caves and crevices to hide and hunt, and preferably a tank with dim light. The tank should not have a strong waterflow as the Marine Betta is a relatively weak swimmer. They should also not be housed with small, vulnerable fish or inverts that could be come a quick snack, or with aggressive eaters like damsels that would steal all of the Marine Betta's potential food.