possible spawning soon?

[usb540]

I have a b&w occ. and an orange occ.. My b&w just started moving sand from an area next to my trumpet coral. The orange one came over and started helping. Both of them doing major dancing around and getting really crazy. Prior to this the b&w has been hovering very close to my goby who hangs out in this spot also. Practically laying on top of the goby. No fighting or nipping.
This is just something new that I've never seen before since i have owned them. I've had them for about a year and a half now. Just thought I would share. These guys are truly clowns.