No idea what this is, with pic

[EddieKay]

I posted this yesterday day but i could'nt attach picture, so here is is.
Should I be worried.

 

[SnowManSnow]

hey. what are we trying to see? looks like glass with coraline algae starting to grow...not sure what I'm looking for

 

[EddieKay]

Thats what i'm thinking, they just showed up 4-5 days ago. Tank was just setup 4 weeks ago, live rock added 2 weeks ago. They show up in clusters and they dont move. They have a pinkish center and what looks like tiny tenticles that dont move(looks like they attach to the glass with them) everyday more and more show up

 

[SnowManSnow]

I think your spots are coraline algae.. let it grow.. but scrape it off the front touch it.. see if it feels hard.. like a calcium deposit.. if it does.. I'm bettin it Coraline

good guys

 

[investigator1]

They are called hydroids. Think of them as tiny jellyfish. They will multiply and then just fade away in a couple of weeks.

 

[Sugar Magnolia]

Yup, hydroids. Ditto what the investigator said.

 

[Anonymous]

Be careful touching anything unknown in a reef tank. Some things are not without the ability to defend themselves.