Reticulated Hillstream Loach

Reticulated Hillstream Loach (Sewellia lineolata)

The Reticulated Hillstream Loach is one of the most unique and fascinating freshwater fish available in the aquarium hobby. Often compared to a miniature freshwater stingray, this remarkable species features an intricate maze-like pattern across its body and specially adapted fins that allow it to cling to rocks, glass, and other surfaces in flowing water. Its unusual appearance and entertaining behavior make it a favorite among aquarists looking for something truly different.

Native to the fast-moving streams of Vietnam, Reticulated Hillstream Loaches thrive in aquariums with excellent water quality, high oxygen levels, and moderate to strong water movement. They spend much of their time grazing on biofilm, algae, and microorganisms found on rocks and aquarium surfaces. Watching them glide across glass and hardscape is both fascinating and rewarding, making them a standout addition to planted aquariums and river-style setups.

These peaceful fish do well in community aquariums with similarly non-aggressive tank mates. While they will consume naturally occurring algae and biofilm, they should also be provided with high-quality sinking foods, algae wafers, frozen foods, and other prepared diets to ensure proper nutrition. Mature aquariums with established biofilm growth are especially beneficial for long-term success.

Scientific Name: Sewellia lineolata
Care Level: Moderate
Temperament: Peaceful
Diet: Omnivore
Adult Size: Up to 3 Inches
Minimum Tank Size: 20 Gallons
Origin: Vietnam
Plant Safe: Yes

If you're looking for a truly unique freshwater fish, the Reticulated Hillstream Loach is an exceptional choice. Its intricate pattern, fascinating behavior, and ability to thrive in well-maintained planted aquariums make it a favorite among aquascapers and freshwater enthusiasts alike.