Blasto Problems :-( Need advice/help

We have a blastomussa wellsi in our tank that seems to be having issues. We have had it for 5 months and it seemed like it was doing great until about 2 weeks ago. When the problem started, it looked like the center of one of the polyps was burning out. Then it started to spread across the bottom of that polyp and toward the right side. When the blasto puffs up completely, you can hardly see the problem area. We have included several pictures so that you can see what we are talking about. The white part that we are referring to is soft tissue and it isn't hard like the polyp's skeleton.

Tank Specs:
46 gallons
4x39W T5 Light
All water measurements well within normal parameters







What is this? How do we stop it?

 

Welcome to 3reef,

To me it looks like a type of worms burrow. Another thought may be some type of sponge but I can not really see enough detail (although those are good images).

Thank you for including the detailed images.

 

welcome to 3reef corailine is correct in my opinion just brush him off the coral and the coral should be find, looks like a spaghetti worm if so he is harmless in the sand bed but, has been known to keep coral from opening up

ps beauitful tank

 

Thanks guys!!! That was definitely it! We removed the worm and got rid of it just in case. The polyp that was underneath is a little damaged and extremely irritated, but with a little time, we think it will bounce back.