I'll try to keep this as brief as possible. I've got a small texas (3 inches or so) being housed alone. It had built a nest in the gravel, moving it to form an indentation that reached to the bottom pane of glass. I disturbed this nest when cleaning the gravel yesterday, and it has started to build a nest again. Any idea as to whether or not it will keep doing this? Any idea of the sex? I'm thinking female, but I'm not seeing the dark spot on the dorsal fin that I've heard about. There is a dark spot on the middle of the body and on the caudal peduncle. Thanks in advance.