What are these?

[inadaze]

Hi,
There are two things in my aquarium which i cannot identify. It's really starting to bug me...
The first are these really small white balls with short white tentacles ( hair thin) around them. They cling onto my algae on the glass and such. There is probably a hundred of them.
Also, I've found three or four of these honeycomb-like things on my glass behind my live rock. They look like white bee-hives and they're about the size of a coin.
Sorry my discriptions were so lame. If someone can tell me what they are, or if I should get rid of them for that matter, I would really appreciate it.
Thanks
Jay

 

[tazdevil]

First sounds like tube worms. Second sounds like some sort of sponge or egg pod (for snails or worms). Neither is harmful. Check the hitchiker's faq, described there.