http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=how-do-i-tell#1 how do i tee the sex of a coolie loach i have two of them and i cant tell the sex of them the pet shop dont know ether gonemad 2009-05-26 http://forum.aqua-fish.net/?topic=how-do-i-tell#2 the female may be slightly bigger, and when she has eggs you should see her swollen. other than that, its hard to tell! these are usually kept in groups anyway, so buying a few would probably result in at least one of each gender. beware the Kuhli loach will often completely disappear under the gravel/sand in your tank though! more information here: http://www.aqua-fish.net/show.php?h=kuhliloach1 good luck if you are breeding weirdartist 2009-05-26