Pangio is a widespread genus of small, eel- or worm-like loaches from Southeast Asia. Many similar species are traded under the banner of Pangio kuhlii; these are actually most likely to be Pangio semicincta. Kuhli loaches are reclusive and nocturnal, although having a large group of them and plenty of hiding spaces make them more outgoing. You may not see your Kuhlis all day but they are known to go crazy when the aquarium is fed! Kuhlis prefer a soft substrate in which they can burrow completely, and act more comfortably and naturally in setup with such.