Went down to check on the tank yesterday and noticed the whole thing was pretty cloudy. My first thought was that some sort of disaster struck but after a little investigation it turns out that my giant bristle star was spawning. I've had snail eggs and spawning urchins but this was a first for me. It's particularly odd since I didn't really do much to the tank yesterday. In the past I've had urchins spawn after a tank move or some sort of large water change. The bristle star spread all the way out under the frag racks, lifted it's disk up, fanned it's legs and kept puffing out 'smoke.' There isn't another large bristle start in the tank but it was a good coral feeding.