The Dragon Goby (Gobioides broussonnetii) is one of aquaria's most deceptive fish: it looks ferocious but is wholly peaceful. With its elongated, eel-like body reaching up to 60 cm, iridescent silver-violet coloration, and an enormous, gaping, toothy mouth, it appears every bit the predator its 'Dragon Fish' nickname implies. In reality, it is a gentle omnivore that feeds on algae, diatoms, detritus, and tiny invertebrates scraped from substrate surfaces.
Native to the brackish estuaries, tidal flats, and mangrove edges along the Atlantic coast from the southeastern United States to northern South America, the Dragon Goby spends most of its time buried in soft mud or sheltering in crevices near the bottom. Its natural habitat is subject to significant salinity fluctuation, and in the aquarium it thrives in low-end brackish conditions.
Despite its size, its tank requirements center more on floor space and appropriate substrate than raw volume. It is a burrower and benefits enormously from a deep, fine sandy substrate into which it can partially or fully bury itself. It is timid and easily stressed by boisterous tank mates or bright, exposed conditions.
Its unique combination of dramatic appearance, peaceful behavior, and unusual ecology makes it a compelling centerpiece for aquarists interested in brackish biotope aquariums. Its care requirements are manageable, though its specialized diet and brackish needs place it in the intermediate category.
