How can i tell the gender of my khuli loaches?

Question

I just bought 2 and wanted to know what gender they were

Answer 1

It's very difficult to tell, but when mature females will develop their eggs, which have a green colour, and you may be able to see a slight green tinge on their bellies.

Otherwise the only way you're going to know is if you see one laying eggs, and the other fertilising them!

Answer 2

There's no definitive way, but females tend to be more round and may have a green tinge in their abdomens at times (filling with their green eggs).  If you're trying to breed them, it's best to start with a large group to increase your odds.