Snail-type conch parasite with pics

[SimplyVibing]

Posted a thread about this yesterday but didn’t have pictures. My conch came with what I assumed were two spirals on the tip of its shell. More the merrier right? But yesterday for the first time in months one of the spirals poked its head out stuck a black tentacle out. Really creepy.

Anybody know what this thing is, and if it’s dangerous? It’s probably a half inch, and it’s flesh is black.

 

[GoldeneyeRet]

Looks like a vermetid snail has grown on your conch.

 

[motortrendz]

Looks like a vermetid snail has grown on your conch.

I'd agree with this

 

[matttaylor1976]

Looks like a barnacle, it's a harmless hitchhiker. Any chance you can pick up the conch and get a clearer shot of the back of the shell?

 

[GoldeneyeRet]

Yes could also be a barnacle

 

[flsalty]

Vermetids and barnacles don't have black tentacles. I believe it was correctly identified in the other thread as a limpet.

 

[reef lover]

Yes it was....a slipper limpet.