We get these fish by "accident". First I bought just one fish, but that one died immediately.
Got heart attack ore something. I'm always really specific with acclimating my fish/coral etc. Well, my dealer knows that and I got new fish for free, but he got only this pair...Well, we got two of them now.
First spawn came as a total suprise. That was my firs aquarium ever and got it running in beginning of march 2012. One day I just noticed, that the larger one was nibbling the smaller all the time and chaseing her around. The larger one was also get really dark, almost blue. After this, the smaller dissapeared and the larger one vas building a HUGE sand castle over their homestone. I was really worried, because then I didn't know anything about their courting and spawning behavior. Female stayed in the nest next 4 days. In fourth days evening we were watcing tv, when I suddenly realized, that something strange is happening is aquarium. It was approx. 10pm and they had released the larva. The whole aquarium (270l) was full of them.
Well, in may I moved them to a larger aquarium and they stopped spawning. (female jumped in the floor when moving them. Maby that's why stopped?Ore just because of the stress of moving.)
But yesterday they started courting again and today the female is missing and male is building a sand castle again.

Now I'm prepared littlebit better, so I hope the spawn will be successful.