what could it be?

[tanyamikephil]

I noticed in a nook in the rock a small white fuzzy looking thing, kinda looks like a small cocoon. When I investigated further I saw more little fuzz ball looking ones around the tank.

Any ideas on this?

 

[cloak]

Pineapple sponge perhaps? These are quite common in new tanks.

http://www.lionfishlair.com/hitchhiker.shtml

 

[tanyamikephil]

Is that bad? Do I need to do anything about them?

The one that looks like a cocoon has a tiny opening at the end of it.

 

[cloak]

Most sponges are generally harmless, but there are some varieties that can smother your corals if left unchecked. I don't think this is what your dealing with though.

http://www.advancedaquarist.com/2011/6/inverts2

 

[tanyamikephil]

Most sponges are generally harmless, but there are some varieties that can smother your corals if left unchecked. I don't think this is what your dealing with though.

http://www.advancedaquarist.com/2011/6/inverts2

Thanks for responding"¦I feel relieved now, but I will keep an eye on them.