Hiker on Snail Please Help

[Reef Racket]

Just got these from LA. Any ideas what these small black hikers are? Anything to worry about?

 

[thatmanMIKEson]

do they scrape off? hard to tell what it is.... its not a Asterina starfish?

 

[Reef Racket]

do they scrape off? hard to tell what it is.... its not a Asterina starfish?

Astrea Turbo Snail, and they are really hard to scrape off but when they do and when they break there is some worm/snail type insides.

 

[Sharkbait19]

Kind of looks like a tunicates of some sort (like barnacles), I have seen them on my astreas sometimes. Not a problem as far as I’ve seen.

 

[a.t.t.r]

Harmless filter feeds.