What the heck good or bad??

[Kodvenom]

I added some live rock today to my tank and later tonight when I went to go shut the lights off I saw these four yellow things and don't know if its good or bad?!?

 

[MINItron]

Just yellow polyps. They can spread a little quickly, but nothing like pulsing Xenia or some some of the other bothersome sessile inverts.

 

[Kodvenom]

Is it ok ? Seems fine unless starts to take over anything feed on it to keep it in control?

 

[MINItron]

They are the parazoanthus genus that is related to the other zoanthids. They are not poisonous like palys so polyp munchers are more likely to snack on them. My toby has decimated my yellow polyps. They keep trying to come back though. I guess I should move the rock to my refugium for a while.

The are photosynthetic, and will eat whatever floats by. I have even seen one eat a piece of pellet fish food. You don't have to worry about them eating your fish or stinging other inverts though.

 

[Kodvenom]

Cool it's nice to get free hitch hijers