Can someone tell me what this is!?!?

[H.garza10]

Just found this today when the lights came on. I have no idea what it is and it seems to be stuck to the rock.

Tank inhabitants are:
2 Clowns
1 Midas Blenny
1 Axil Chromis
Duncan
Birds Nest
Zoas
Rock Nem
Frogspawn
Hammer
Snails
Crabs
Peppermint Shrimp

 

[PSU4ME]

Looks like a sponge to me

 

[Redfoxtang]

Looks like a sponge and some GHA!

 

[H.garza10]

Looks like a sponge and some GHA!

It’s BARELY hanging on. It’s almost looks like it wants to fall off when the flow hits it just right. As far as the GHA Lol tank is fairly new (3 1/2 months) and still going g through it’s ugly phase

 

[Redfoxtang]

As it might fall off if your powerheads hit it just right. Sponge is nothing to be worried about though. As for the GHA I was just giving you a hard time. ;)

 

[vetteguy53081]

Sponge and nice color being a sponge

 

[Anchor]

Sponge or early stage red bubble algae???

 

[Rmckoy]

I had a long calcified tube on one of my rocks that is always spewing long string like stuff all
Over my birds nest.
It’s a worm .
what kind I’m not 100% sure

 

[Hydrored]

I had a long calcified tube on one of my rocks that is always spewing long string like stuff all
Over my birds nest.
It’s a worm .
what kind I’m not 100% sure

Verminted snail

 

[H.garza10]

Sponge and nice color being a sponge

So it’s a keeper???

 

[vetteguy53081]

So it’s a keeper???

Yes- filter feeder

 

[krash7172]

If something is in question like that, I say remove if you can easily. It's probably a sponge and fine to keep. Red bubble algae is actually kinda cool though IMO.