What this on my Trochus?

[johninja]

Tank is a little over 2 months old, and has some red cyano and diatoms.

0/0/1, 1.025, gkh 8.0, mg 1290, ca 365, pho 0.00 (I know), 25C.

2 clowns, 2 Trochus, 2 shrooms, 1 sarco.

This looks new, they were clean when I got them (15 days ago). Looks like a red bubble inside a bird's nest, and the other thing is pink and smaller.

 

[KrisReef]

Lots of possibilities. Doesn't appear to be the typical hitchhiker.
Could be a zoa or relative?
Hopefully not invasive.

 

[johninja]

Don't believe it's zoa, don't have them in the tank. Shells were perfectly clean when I got these two.
I found a hole in one of the two bubbles after scraping them, looks similar to vermetid, but it's chubby, not a long tube. Scuze my french. I used cyanoacrylate just in case, snail is roaming around without a care in the world now.

 

[StartingATank]

Looks like it could be some kind of barnacle. Hard to see it very well. Maybe it is like a red uvula or some other macroalgae. Maybe some kind of sponge or tunicate?

 

[johninja]

Looks like it could be some kind of barnacle. Hard to see it very well. Maybe it is like a red uvula or some other macroalgae. Maybe some kind of sponge or tunicate?

Tried to scrape it with xacto, hard as a diamond. Didn't manage to remove it. Snail was ticked so I had to get him back.