There are thousands!

[Coletrickle]

What are these little things? There are litteraly thousand in my fuge and a few in the display. In the picture the black line is a power cord to the skimmer, to give you some idea of it's size.

 

[ZOOT098]

they are q-tip sponges
no worries
good natural filter feeders
i have tons of them too

 

[cthegame]

+1 zoot

 

[bobby]

+1 I had tons they will get lower in number as your tank matures but in the mean time they're helping keep the water clean.

 

[Bifferwine]

Another name for them is scypha sponge.

 

[yote]

Gotta agree with all the above.