Hill Stream Loach, Butterfly Loach, or I've even
seen them called Stingray Plecos, live in fast moving streams where
the water is cool and saturated with oxygen. A tank with many hiding
places, smooth rocks and current are a must.
In groups Hillstream loaches will defend, from others
of their species, their favorite spot by flashing their Dorsal fin
at one another and trying to push one another away from their area.