Cocoons

[RHorton]

I have these white cocoons poping up all over my live rock it's getting to a point where there covering everything they look like little oval cotton cocoons with a small opening at the top. anybody know what they might be and how do I get rid of them or control there numbers.

[rlcline76]

little sponges.

[rlcline76]

Originally Posted by rlcline76

little sponges.

To be a little more specific, now that I have made it through my first pot of coffee, a calcareous sponge.

[RHorton]

aren't those made from calcium carbonate spicules? these things you can squeeze with your finger and they feel squishy like wet cotton they fall apart real easy. I'll try to get a pick.

[rlcline76]

It's a sponge. I got the name from Shimek. Looks like a pineapple. They get everywhere, in the equipment rocks...you name it. I hear tales that their population can depend on the nutrients found in the water.

[RHorton]

here is a pic closest I could get.

[rlcline76]

Sponges.

[David Renke]

About 5mm in lengh? I have 100s of them in my Nano, they usualy apear in mature systems.

[RHorton]

yeh about that length. +1 to hundreds of them.
They are all over top of my heater to the sides of the glass.
just wanted to make sure they won't hurt the coral.
I'm assuming there a filter feeder because of the fine fibers near the opening.