Stigmatogobius sella

<em>Stigmatogobius sella</em> is a small brackish-water goby belonging to the family Gobiidae. This compact species typically reaches a maximum length of around 4 cm, making it one of the more diminutive members of its genus. Gobiidae is among the largest fish families in the world, comprising thousands of species adapted to a broad range of aquatic environments. <em>Stigmatogobius sella</em> inhabits the transitional zone between freshwater and marine systems, where salinity levels fluctuate with tidal rhythms and seasonal rainfall. Such brackish conditions are often found in estuaries, mangrove channels, and tidal flats across its native range in Southeast Asia. The species is benthic by nature, spending much of its time close to the substrate, where it forages for small invertebrates and organic matter. Its laterally compressed body and fused pelvic fins, characteristic of gobies, help it maneuver and rest among sediment and detritus. <em>Stigmatogobius sella</em> has attracted modest interest among brackish-water aquarium enthusiasts owing to its peaceful temperament and manageable size. In a captive setting it typically thrives in a tank of at least 60 liters with a sand or fine-gravel substrate, gentle filtration, and a specific gravity of approximately 1.005 to 1.015. Regular partial water changes and the inclusion of hiding structures such as rocks or driftwood help replicate its natural habitat and reduce stress. Details of broader habitat and range for this species remain limited in the ichthyological literature.