Sponge ID?

[WhatCouldGoWrong71]

Good or bad? After reading @Paul B ‘s experience with a sponge that took over his tank, I saw this and was like dang… I took this rock out of my display. When I had it stock tank while I was consolidating my systems, I accidentally put this on top of a large snail. The snail died and this sponge grew out of the shell and all over the rock. There was not great water flow where it was. Now, whatever this rock touches, this sponge grows on it. I’m really clearly that I am going to wake up one day and have 400 gallons of great stuff… lol

 

[Subsea]

Sponges come in all shapes and colors. I am not sure what I am looking at on your different pictures.

Would you post a close up with white light?

I keep many ornamental & cryptic sponges from the Caribbean.

 

[WhatCouldGoWrong71]

The one of it in my display by the coral is simply the rock that other rock was touching. Just showing it there also. But these are close ups.

 

[Subsea]

Looks more like nuisance opportunistic algae

 

[WhatCouldGoWrong71]

It’s unlike any algae I have ever seen. I’ll take the rock out of the tank and get detailed pics.

 

[WhatCouldGoWrong71]

Photos attached

 

[Subsea]

https://www.reef2reef.com/attachments/img_6201-jpeg.4005514/

I am familiar with Caribbean ornamental sponges as well as cryptic sponges. Your picture doesn’t look like any sponges that I have seen. However, there are more than 10K species of sponges identified; no telling how many unidentified species.

It doesn’t look very attractive, how does it respond to a peroxide toothbrushing?

 

[WhatCouldGoWrong71]

It pulls off easy in chunks. But there is a residual left. I didn’t about the peroxide. So bizarre.