What is this?

[newreefnick]

New tank and I'm new to saltwater. This is growing on my live rock. Should I get rid of it?

 

[Lionfish Lair]

Feather dusters. Are they on the underside of the rock?

 

[newreefnick]

Feather dusters. Are they on the underside of the rock?

Yeah I know about those. I caught them going in and out as I watched. What about the spherical red thing?

 

[newreefnick]

Yeah I know about those. I caught them going in and out as I watched. What about the spherical red thing?

They came with the rock from the lfs. So yes they are on the underside also.

 

[Lionfish Lair]

That's what the underside of my rock looks like.

 

[newreefnick]

That's what the underside of my rock looks like.

Should I flip it over?

 

[Flippers4pups]

Looks like a mushroom coral. Good guy.