Is this... a sponge?

[siege]

Is this a sponge growing under this piece of Favia??





If so, I'm okay with it.. but like, here's my questions, and problem:

How did it survive being removed from shipping water into open air, submerged for three minutes in Reef Primer, removed again, dipped in clean tank water, removed again and placed in the tank?

And... big thing... this frag as a lot of GHA on it. I was going to put it in an H2O2 dip... but I guess I can't do that now if I want to save the sponge? Is there a way to safely remove it without killing it?

Or am I looking at something else entirely? The Favia growing? Some hitchhiker? If you look carefully, it has what appears to be a siphon or something growing out the upper left side.

 

[Jikkermanccini]

It is indeed a sponge. I don't recall the name of this group of sponges, but they are nearly invincible and can withstand air exposure, low quality water, and serious abuse. it honestly might even survive an h202 dip, but if not, it's likely elsewhere in your tank so you're probably not going to wipe it out.

 

[siege]

It is indeed a sponge. I don't recall the name of this group of sponges, but they are nearly invincible and can withstand air exposure, low quality water, and serious abuse. it honestly might even survive an h202 dip, but if not, it's likely elsewhere in your tank so you're probably not going to wipe it out.

Can it, you think, be trimmed off the underside of the coral with a razor, and survive?

 

[Jikkermanccini]

Can it, you think, be trimmed off the underside of the coral with a razor, and survive?

Most likely yes.