Bumblebee gobies are interesting gobies that are best kept in brackish tanks.
Two species have been seen in the trade as bumblebee gobies, the “true” bumblebee Brachygobius xanthozona and a related species (B. nunus) that otherwise goes by the name golden banded goby. While both species are best suited to brackish conditions, the former is highly tolerant of freshwater while the latter is not. The true bumblebee can be distinguished by its unbroken black bands.
A native of Thailand and Vietnam, B. xanthozona reaches a length of about two inches. It very much prefers at least a little bit of salt (perhaps the small “tonic” dose suggested for most freshwater fishes). It prefers a temperature of 77-86°F and a pH of 7.5-8.5. The aquascape for bumblebee gobies should include plenty of wood and stone; if multiple specimens are to kept, provide adequate space for the establishment of individual territories.
Be ready to use live feed (e.g. artemia) in the event this finicky eater is slow to adapt to a prepared diet.