What are the white sponge things?

[reefnutty]

Hey all,

I have several white sponge looking things growing throughout the tank. They are shaped like a cylinder/gumdrop with a little hole at the top. What are they? They seem harmless, but I have no clue.
I will try to get a good picture tonight if it helps.

Taylor

 

[northbay-reefer]

those are good, don't worry too much about it

 

[clayspst]

i have them in my overflows they filter the water. My LMB eats the ones in the display tank

 

[Caragol]

Sounds like Q-Tip sponges. I get tons of them too, nice little filter feeders.

 

[reefnutty]

Awesome!
So they are beneficial to my tank.
That's good news.

 

[clayspst]

http://www.melevsreef.com/id/sponge.html

do they look like any of these

 

[reefnutty]

Ding.. ding.. ding Yes! The bottom right one. Anyone know what it's called?
I may have some orange sponge growing also.
I got real lucky with my live rock. I even got a sps monti on the live rock for free. It's looking great!

 

[reefnutty]

Nevermind! lol
This is a harmless Scypha sponge. They are very small, and usually found in our overflow boxes and down in the sump. Attached to rock, glass or acrylic or even your plumbing, they may be about the size of a grain of rice or perhaps larger, like Debi's above. These little filter-feeders are reef-safe.