Blasto new head or something else?

[nobatobe]

I’ve had this blasto for almost a year and it’s doing fantastic. The one head that I got is currently splitting into to, but about a month ago I spotted this brown structure on the right growing. Is that new skeleton growing or is it something else? The first picture was right after a water change so you could see the brown stalk better.

 

[Tahoe61]

No idea.
Is it a Vermetid with algae growth on the shell.

 

[nobatobe]

No idea.
Is it a Vermetid with algae growth on the shell.

That's a definite possibility...I've done a little more research and they seem to look like vermetids. Thanks for the advice!

 

[Z-man]

Blasto grow new heads under the single polyp. As you get more heads, the new growth can come in between heads or create a new bottom row. I have never seen anything like that on any of my Blasto's. Maybe a fanworm tube that has some algae growing on it.