How scared should I be?

[rennjidk]

 

[WheatToast]

Tube worm (Serpulidae sp.) and sprirobid worms. Harmless filter-feeders.

 

[Tamberav]

It looks like it could be a featherduster... I see some feathery appendages?

I would not be afraid but would be more bothered that the hammer doesn't seem to have much flesh on the edges.

 

[IKD]

It’s a type of worm I can’t recall the name. They will harm soft flesh. I glued the hole shut which solves the issue.

 

[rennjidk]

I would not be afraid but would be more bothered that the hammer doesn't seem to have much flesh on the edges.

I'm about to make another post as all my corals are very unhappy and I cant seem to find the reason.

 

[IKD]

Everyone sure that’s a harmless worm? Doesn’t look like a duster but rather tentacles/feelers. Just don’t want to mislead the OP

 

[rennjidk]

Everyone sure that’s a harmless worm? Doesn’t look like a duster but rather tentacles/feelers. Just don’t want to mislead the OP

It doesn't look like any tube worm I've ever seen either.

 

[I never finish anythi]

Looks creepy but I vote feather duster

 

[WheatToast]

Spirobranchus cariniferus is a tube worm/feather duster that looks pretty similar to OP's worm:
https://commons.wikimedia.org/wiki/Category:Spirobranchus_cariniferus
https://www.inaturalist.org/taxa/397374-Spirobranchus-cariniferus/browse_photos

 

[Dburr1014]

It looks like it could be a featherduster... I see some feathery appendages?

I would not be afraid but would be more bothered that the hammer doesn't seem to have much flesh on the edges.

+1 that hammer is in bad shape.

 

[landlubber]

It’s a type of worm I can’t recall the name. They will harm soft flesh. I glued the hole shut which solves the issue.

i think you might be referring to a vermetid ?

 

[IKD]

i think you might be referring to a vermetid ?

Not a vermetid. It had the head of a Eunice in some ways. Two main feelers with smaller ones around it. Would pop out at feeding time trying to grab food. Lived in a calcerous tube among a blasto colony. Killed two of the heads either through eating or irritation. The tube was super tough to break. Ended up just gluing it shut.

 

[rennjidk]

Spirobranchus cariniferus is a tube worm/feather duster that looks pretty similar to OP's worm:
https://commons.wikimedia.org/wiki/Category:Spirobranchus_cariniferus
https://www.inaturalist.org/taxa/397374-Spirobranchus-cariniferus/browse_photos

Upon further review, that appears to be it.