What is this?

[Mike N]

Saw this colony looking thing on many live rock this morning. Doesn't seem to move around, but does contract slightly when touched.

 

[lickyricky]

Looks like it might be a Hydroid jellyfish but its hard to tell in the pic. Hydroids are small and harmless (at least this type, the brown ones can be pretty invasive) and they should clear up on their own. I have a few right now hanging out on my glass and back wall. See pic!

 

[Mike N]

Thanks for the reply.
Its not a hydroid jelly. This is like a colony type formation with several "polpys" arranged around the formation.
(sorry for crappy pics, I keep telling myself im going to buy macro camera, but I always buy livestock/equipment instead)

 

[lickyricky]

Thanks for the reply.
Its not a hydroid jelly. This is like a colony type formation with several "polpys" arranged around the formation.

ok, think you need a better picture

 

[Mike N]

ok, think you need a better picture

No doubt.
Maybe someone else can tell from the existing pics, not able to get a better one at the moment.

 

[KJ]

Leather coral?