Sorry about my absence. I was looking at my tank and saw a little white dot head down on a marble chip, so I pipetted it off, and as suspected here was the larva.
So, Brian, here's what you were after. Lots of
zooxanthellae, especially at the oral end. I'll get better photos as I capture more now that I have good traps built. Photos also below. These are 4" PVC caps filled with quick dry cement and a smooth cap of epoxy on top. The rigid mesh is 4" fish trap strainer from Aquatic Eco and I siliconed
plankton mesh using four beads to the inside. These fit right over the caps.