We thought we'd lost our girl, and that's why we went and bought another (who also happened to be female). I had left the door open and we thought she jumped out, although I'm almost certain my dogs would have found her right quickly. So we went and got the other female, brought her home, and before long the "missing" female reappeared. She was able to go missing because when I designed this tank, I've sort of made a bit of an underground cave, and that's where she goes hiding sometimes. Funny, but all of them can disappear when they want to and you would not think there were any Mudskippers in there.
Since adding the 3rd Skipper they have been more active, and are out more, whereas before they seemed to hide alot underwater. I also think the male's aggression has diminished some, maybe he's not sure who he should get after with there being 2 females now.
My husband seems to think we will have babies, but I am not so sure. I think it would be awesome if they did, but I also think it's a long shot. I don't think the tank is suitable for them to spawn. I believe they make burrows in the sand and put their eggs down there, and I don't think they'd be able to do that in my tank. It doesn't matter though because I think they are awesome just as they are. I love watching them, they are so unique!
The only problem I seem to be having is with the micro filters I'm using to keep the water clean and moving. I am not sure if it's sand that gets in there, but it seems that before long, the motor starts making a bit of a noise, or it just stops working altogether! I've been through 2 filters now and am about to get a 3rd. It's hard to find the right filter because the water depth is only about 6-inches, so it limits what you can put in there.
Ah, but it's all worth it! They always bring a smile to my face!