I have a pair of oscellaris that are mated. Or close to it I believe. They have been doing a mating dance on and off for about 4 or 5 months, though I've never seen any signs of eggs. At Christmas I got a more powerful light and finally felt comfortable getting a BTA for them, as the smaller of the 2 clowns was trying to host with all my corals and making them mad all the time. I traded the old light in and got a softball sized green BTA. After a couple days the clowns discovered the BTA and have taken to it, sleep in it every night etc. The BTA never moved from the spot I put it, in moderate flow with a large hole that goes all the way into the hollow center of the 50# rock it's on. So that was a success. Now the clowns are doing their mating dance MUCH more often and I just noticed one of them is fat.... but it's the smaller one. From what I understand the smaller 9f the two is the male. The bigger one pushes the smaller one around by its cloaca, and then the smaller one vibrates in front of the bigger one, if that helps clarify which is which... anyway I haven't seen stringy white poop or any other indications of internal parasite but the smaller clownfish shouldn't have a big fat gut right? Or maybe he just gorged himself? It does seem to get bigger and smaller sometimes...
