I have never owned a pair of anything however I picked up a small picasso about a week ago and have had a large one in my tank for a month and a half to 2 months. Anyway they seemed to get along swimingly immediately. This morning I turned on the light and found him hanging out in one of the nem's but I couldn't find her anywhere (making some assumptions here). I have a large concave capstone on top of the rocks which makes a nice little swim through/cave anyway its a little dark under there but I find her kind of upside down swimming under there with her belly against the ceiling of the rock and even when I fed the tank she didn't come out. Is this spawning behavior?