Thanks, Eve. I am pretty sure he is a he, too! I am hoping that someone who has tons of gecko experience can tell me for sure. I heard that most of what is sold in the pet trade are females, but just my luck, I get a male. That's okay. I have them in a 55 gallon tank, so it will be easy to separate them and they will each have plenty of room. Will it be okay for them to see each other through the divider?