The Blue Tail Borneo Sucker, scientifically known as Gastromyzon aeroides, is a beautifully adapted hillstream loach native to the fast-flowing, clear mountain rivers of Borneo. This species is perfectly designed for life in strong currents, clinging to rocks and feeding on biofilm in the cool, oxygen-rich waters of its natural habitat. Its unique form and subtle yet striking coloration make it a prized choice for aquarists who enjoy maintaining specialized, riverine environments. The body of the Blue Tail Borneo Sucker is flattened and disc-like, a shape that allows it to resist the force of rushing water. Its fins are broad and muscular, helping it anchor securely to rocks and other surfaces. As its name suggests, one of its most captivating features is the beautiful blue hue that graces the tail and sometimes the edges of its fins, contrasting elegantly with its mottled brown and olive body. Under good lighting, this iridescent coloration becomes especially vivid, lending the fish an understated but captivating beauty. In aquariums, Gastromyzon aeroides thrives when provided with an environment that closely mimics its natural habitat. A setup with smooth river stones, fine gravel or sand substrate, and plenty of water movement is essential. Strong filtration and aeration ensure high oxygen levels, while cool, clean water keeps the fish healthy and active. These loaches appreciate shaded areas created by rock formations or hardy plants like Anubias or Java fern, which can be attached to driftwood or stones. This species is peaceful and well-suited to community tanks with other small, non-aggressive fish that enjoy similar conditions. Ideal companions include danios, rasboras, and other hillstream loaches. They do best when kept in groups, as they are social by nature and display more natural behaviors when among their own kind. Watching them move across rocks in search of food or rest in the flow of the current is both calming and fascinating. The diet of the Blue Tail Borneo Sucker should include a combination of natural grazing and supplemental foods. They feed primarily on algae and microorganisms growing on rocks, so a well-established tank with biofilm is beneficial. To support their nutrition, aquarists can offer sinking algae wafers, blanched vegetables, and occasional protein-rich treats such as frozen daphnia or bloodworms. Breeding this species in captivity is extremely uncommon, as it likely requires specific environmental conditions similar to those found in its native streams, including changes in flow and temperature that are difficult to replicate. Overall, the Blue Tail Borneo Sucker is a captivating addition for aquarists who appreciate the beauty and tranquility of flowing-water habitats. Its combination of peaceful behavior, specialized adaptations, and distinctive coloration makes it a rewarding and mesmerizing species to observe in a carefully maintained aquarium setting.