Split end white tenticle on live rock

Joeh · Jul 18, 2018

Hey guys, first post and first time regiserting. I found on one of my live rocks had a clear white tenticle coming out of between the rocks and seems to have split ends (hammer coral end looking). As soon as i turn the lights on it goes back in between the rocks. When lights are iff, it streches upto 2-3inches far out. Could you experts tell me what these are and if they are reef safe? Thank you

Crabs McJones · Jul 18, 2018

Joeh said:
Hey guys, first post and first time regiserting. I found on one of my live rocks had a clear white tenticle coming out of between the rocks and seems to have split ends (hammer coral end looking). As soon as i turn the lights on it goes back in between the rocks. When lights are iff, it streches upto 2-3inches far out. Could you experts tell me what these are and if they are reef safe? Thank you

Welcome to R2R!

#WelcometoR2R

I believe what you're looking at is a type of digitate hydroid.

DSC reef · Jul 18, 2018

Welcome to R2R.

reef lover · Jul 18, 2018

Welcome to r2r!! Cant spell it but a type of worm whom builds a tube out of substrate and eats detritus...hes good

Joeh · Jul 18, 2018

Hmm... did some research and only read bad info about digitate hyroids. That they sting, bad for reef, and can multiply lot and fast... let me know if this is any ture and if it is, how i would be able to handle this problem.

kirstyflash · Jul 18, 2018

reef lover said:
Welcome to r2r!! Cant spell it but a type of worm whom builds a tube out of substrate and eats detritus...hes good

Spionid? Or Chaetopterid?

Lovemyreef2015 · Jul 18, 2018

Welcome to R2R

Crabs McJones · Jul 18, 2018

Joeh said:
Hmm... did some research and only read bad info about digitate hyroids. That they sting, bad for reef, and can multiply lot and fast... let me know if this is any ture and if it is, how i would be able to handle this problem.

Can you get a better pic to confirm?

WV Reefer · Jul 18, 2018

Joeh said:
Hey guys, first post and first time regiserting. I found on one of my live rocks had a clear white tenticle coming out of between the rocks and seems to have split ends (hammer coral end looking). As soon as i turn the lights on it goes back in between the rocks. When lights are iff, it streches upto 2-3inches far out. Could you experts tell me what these are and if they are reef safe? Thank you

As someone else mentioned it’s chaetopterid worm. Mostly harmless but can annoy Corals.

KJ · Jul 18, 2018

Spionid worm. Welcome to R2R!!!

Reefer Deez · Jul 18, 2018

Hello and welcome to R2R

Joeh · Jul 18, 2018

Hmmm... all of the things thay is mentioned does not seem to be looking same after doing their research.. i also can not see it out now so i will upload picture later. It is fairly thick one long tenticle (not mucus) with split ends. Looks like hammer coral tips or like a bean sprout tips. Try zooming the picture i uploaded... the tip os bit camo due to sand but still can see. Its on the left side of the tunnel of the rock.