Kuhli loaches are small, eel-like freshwater fish, roughly 3-4 inches long, with a slender, segmented body featuring dark brown or black vertical stripes on a salmon-pink or yellowish background. They have a smooth, scaleless body with a distinctive head featuring barbels (whiskers) for foraging and small eyes covered by a transparent layer of skin. These nocturnal, peaceful, and communal bottom-dwellers are known for their active behavior in aquariums, particularly when kept in groups.