ID from Tentacle

[tdileo]

I have noticed this thing in my tank for a week or so now. It looks like just the tetacle of an animal and it moves around, but always in the some hole in the rock. It is very hard to take pictures of and is not more or less active during the day or night. I do have spaghetti worms in my tank but these seem much different. Here is a photo, I know it's not the best but maybe somebody will know.

 

[Ocelaris]

Is it a micro brittle star? I have hundreds if not thousands in my tank. They're sort of striped and wave their arms out of holes when the food is floating by.

 

[Tyler_Fishman]

Yes its a brittle star, this is common behavior

 

[tdileo]

Yes its a brittle star, this is common behavior

Definitely not a micro brittle star. I have quite a few and know what they are. The tentacle is super thin and is white/transparent.

 

[Ocelaris]

Maybe a vermetid snail?

 

[tdileo]

Maybe a vermetid snail?

I thought that at first too but it is not the same web and I don't ever see it catch anything.

 

[Nburg's Reef]

Spionidae Worm?

 

[I'm a natural blue]

@Lionfish Lair ?

 

[Tahoe61]

Could be a peanut worm or an ribbon worm. Does it retract back into the hole when disturbed?

 

[tdileo]

Could be a peanut worm or an ribbon worm. Does it retract back into the hole when disturbed?

Honestly I haven't poked at it or anything yet so I'm not sure. I do hope its a peanut worm though, they're pretty cool looking