Im not too sure how to sex them other then their size but i know they are about the same age so i suppose it is a pair. I tried to put some places for them to hide although they are not using the hiding spots . Yeah and i forgot to mention the ivy in the back im going to train it to grow down the rocks. Oh so the plant in the middle is a jade? lol thanks! and they are nothing special just junk from lowes hardware :P