Anyone know what this is growing?

[Charles Belisle]

Anyone know what this is? It looks like snot growing on a few of my live rocks. It started out on one rock. I did a fresh water scrub and it went away for about a month. Now it is back and jumped to another rock. I have seen hermits, emerald craps, and snails eating on it from time to time. Is it bad? How do I get rid of it?

Thanks

 

[Mikedawg]

Sponge

 

[sixty_reefer]

Looks like a sponge, hard to point out the right one without a more focus picture

 

[ScottB]

Is it growing in the shade or in the light? How old is the tank?

Does look to be sponge; but I typically see them in shady spots or in my sump. Assuming it is sponge, nothing to worry about. It is actually a sign of good tank health.

 

[Charles Belisle]

Picture with the rock with a shell, it starts out in shade under the rock and then grows up into the light and across the rock. The other pictures; it was growing under another rock, when I did a water change it got exposed to the lighted areas. Will it continue to take over the tank? or stay on a couple rocks. The tank is about year and half old. Broke it down 2 months ago to move; but maintained all rocks, sand, etc..

 

[DSC reef]

Agree with sponge, some can grow in open light areas and shaded areas.

 

[Charles Belisle]

will it stay fungus looking or will it firm up like the sponges you buy in an Art store?

 

[eschaton]

Why would you scrub something off your rock if you had no idea what it was? Most hitchhikers are a good thing.

 

[Charles Belisle]

Thought it might be some decaying food trapped in the holes of the rock.

 

[DSC reef]

will it stay fungus looking or will it firm up like the sponges you buy in an Art store?

Those sponges are dry and dead. Some sponges look neat in a tank IMO.