what is it?

[Erok7620]

I was told at the LFS it was not aiptasia which was my first guess since it has been spreading rapidly. They thought it was some sort of polyp. It hitchhiked on the LR. What do you all think?

 

[Innovator]

Looks to be Pachyclavularia. Is there a red-purple mat from where the polyps extend from that is not showing up in the pics?

 

[Erok7620]

yes, its kinda of a pinkish light purple mat.
doesnt look like this though Tidal Gardens - Pachyclavularia

 

[Innovator]

Pachyclavularia then

 

[Kurt_Nelson]

Yup... or some variation of the species. Definitely not aiptasia, so rest easy!

 

[Sadielynn]

It actually looks like an encrusting gorgonia ...Mobile Bay Reef Keepers :: Encrusting Gorgonia Jan 1 2004 middle of tank
Or it could be a gsp , they can be confusing at times ...

 

[usmcmarc]

Yeah..Green Star Polyps...nice!!

 

[johnmaloney]

hydroids.

 

[Sadielynn]

hydroids.

absolutely NOT hydroids , it is as been IDed either encrusting gorgonia or GSP.

 

[johnmaloney]

Sorry, but I still disagree. They still look like hydroids to me. gorgnia or gsp? I don't see it but maybe you are right.

 

[Sadielynn]

Second row first pics
Gorgonia & Sponges

Archives::Gorgonian
Encrusting Gorgonian - Large | Polyps | Corals & Invertebrates | Aquarium Livestock - ThatPetPlace.com

GreenStars

Green Star Polyps, Pachyclavularia violacea - Briareum violacea

Polyp Rocks - Zooanthid, Star, Button, Sand, Yellow