Please identify pictures, fuzzy white worms and green tubelike plants

[Polypnewbie]

Please identify my pictures. What is the fuzzy white worm things growing on my filter (right on top of the vermetid snails) with antennae...and what is the green plant tube thing coming from my rock?

My pictures always post sideways, I don't know why.

My colony of eagle eyes zoas died off, seemingly being rotted off inside out. I tried everything. Anyway, I'm left with vermetid snails taking over the empty tank including the Rock the zoas were on and now the filter itself.

On the filter, there are the vermetid snails and these unidentified white fuzzy worm looking things with two antennae like things. There are two pictures of two different ones.

On the rock itself, there is some sort of green tube plantlike thing that seems nondescript from the front, but from the side, it just looks like one disturbingly long growth.

Any help would be appreciated.

Pic. 1

 

[Polypnewbie]

Pic. 2

 

[Polypnewbie]

Pic. 3

 

[Polypnewbie]

Pic. 4

 

[Dkuhlmann]

Your pictures are posting sideways because that is how you were holding your phone. Rotate your phone to the left when you take a picture next time and your pictures will be posted in the correct position.

The white things with the feathers on top look like Pineapple sponges. I also see Aiptasia, can't tell from the picture about the green stuff but I'd suspect some kind of macro algae.

 

[cloak]

Pictures one & two just look like harmless pineapple sponges. The green macro algae in pictures three & four might be Caulerpa peltata, but it's kind of hard to tell for sure. A closer more detailed shot would definitely help.

http://www.saltcorner.com/AquariumLibrary/browsegroupspecies.php?GroupID=86

 

[BlueRoofTang]

Yeh, the fuzzy white things are hydroids. They won't hurt anything and are actually good...but if you don't like them, you can get rid of them. They typically aren't out in the open where they look bad and people just leave them alone.

 

[Polypnewbie]

Cloak: your reply was revelatory. I knew something was irritating the eagle eye colony I had from the inside out, but didn't know what. I figured there had to be some other explanation. I posted half a dozen questions about what I was doing wrong. But it was this rare algae growing inside all along, that makes its stronghold by already existing soft coral. It's grown out of every opening my soft coral used to be. You have an incredible eye for identification. Thank you for clearing up my mystery. I just wish that thing hadn't been there in the first place to slowly knock off all my polyps. I'm done with polyps and coral now. The invisible unknown inside the rock is mindnumbing to me. I'm getting a tuxedo urchin soon with hopefully better results. Thanks again!