What is this? They/it popped out my live rock I bought today. Is it reef safe?

[Phoerut]

 

[youcallmenny1]

Bristle worm. Some people don't like them but I just see them as part of the CUC and microfauna of a reef tank. They're detritovores but touching them will stick a bunch of slightly itchy spines in your skin. No biggie but it can be a hassle if you manage to grab a handful.

 

[PhilMStudy]

Looks like a bristleworm

 

[Rmckoy]

+1 Bristle worm .
they are a great member of your cuc crew .
their population and size depends on available food .
they can grow very long and numbers can multiply fast .

 

[Rmckoy]

These Interesting but creepy creatures are only the beginning ……

How many times over the years have I said “ we what the heck is that

 

[Phoerut]

Thanks guys it’s deffo a bristle worm or 2. One came right out last night. It’s huge!!

 

[Conchman]

Mostly harmless until you make contact, decent for reef, scare the H*&^ out of me, so I try and keep them out, make my spine crawl...just me, sorry.

 

[A Young reefer]

This is one of the many scenarios that I mentioned about live rock, in your previous thread. They should be harmless, however keep an eye for larger ones and other hitchhikers.