whats this?

[sacktheqb65]

Does anyone know what this is? It just started growing on my rocks one day. Thanks!

 

[sacktheqb65]

its purple and spiky... unfortunately thats the best picture i could manage to take...

 

[DianaKay]

I can't be for sure looking at that picture, but it looks like it might be Vermetid Snails.
If it is, you should see some spiderweb looking nets that they put out to capture food.
They don't move around & they are sharpe if you break them off.
Just not sure that's what it is tho

 

[sacktheqb65]

Could be... there was a spider web looking thing but the CUC has since disposed of that. Sorry, I couldnt get my camera to focus any better than that.

 

[reefer gladness]

Probably just coralline algae. It comes in many forms, they've documented over 1600 varieties already.

 

[frisbee]

They look like either Vermetid snails or Foraminiferans to me.

http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml

 

[Steve L]

Probably just coralline algae gowing on something that was in there already but nearly invisible because of the color. Sometimes little tube worms and/or feather dusters grow on things and you don't even know they are there until the coralline starts growing on them.

 

[Overlook Reef]

Looks like Foraminiferans to me.

 

[Mike Johnson]

My first thought was also Foraminiferans.