It happens, and I should have figured with how small he was when you got him. All seahorses are born looking like females, and then they grow their pouch later on. Usually this happens sometime in the first 3-6 months, but sometimes it can be years. There is at least 1 case of a female seahorse who actually produced eggs and then grew a pouch... but that wasn't normal, and certainly not what happened with cocopuff. Cocopuff was just an immature boy.
How is he doing? I just read something recently suggesting that temperature requirements may be one of the big problems for the imported Kelloggi, since Kelloggi, while found in tropical areas, are found a deep depths where waters are cooler. It seems like if he was a true Kelloggi, you might want to experiment with cooler water (around 68-70), which would even work out even after you introduce your erectus, since northern erectus are often more comfortable at subtropical temperatures too. If he's a full blood Reidi, in my experience he would be happy at 71-72, but I've never personally taken my Reidi any lower than that (didn't consider experimenting until this summer, and now 71 is as low as I can go until winter), although they do really seem prefer temps around 72.
Have you started the nerve wracking experience yet of mixing the erectus water in with him? Or are you waiting the full 6 week QT to start that (which IMO would be better, but I know some people are impatient or have insufficient QT for that long)?
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