Pix & ID: Critters that come in your rocks: the good and the bad.

Oh well, thanks for the ID. Was hoping it'd be something else, its in a bad spot on the bottom piece of rock in my formation, luckily I have a friend with a highpowered laser pointer I can borrow hopefully I have enough room to get a shot at it. Guess I'll grab a couple peppermint shrimps too I'm sure thats not the only one in there.
 
Looking in my tank tonight and saw quite of few of these 'arms' sticking out of a colony of zoas. They are grayish with black stripes, long and thin and are moving about. I've tried searching but haven't had any luck figuring this out. Honestly don't seem to bother the zoas.
 

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J2T said:
Looking in my tank tonight and saw quite of few of these 'arms' sticking out of a colony of zoas. They are grayish with black stripes, long and thin and are moving about. I've tried searching but haven't had any luck figuring this out. Honestly don't seem to bother the zoas.
Click to expand...

Terebellid worm. It's a harmless detrivore.
 
So i just received my first batch of rock.. and i had a couple of questions on what some things are.
 

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I had a friend come over and look as well and he said it was Hair Algae, it came on the rocks when i got it.
 
Thank you SushiGirl for helping me out on my previous identification!

Finally got rid of the 1,000s of Hydroid Jellyfish on the glass, and now I have dozens of these. Are they adult jellyfish, or something new please?


Untitled by nimicohgr, on Flickr

Any help would be appreciated.
 
SushiGirl said:
Flatworms, the harmless kind (except to copepods LOL).
Click to expand...

LOL, just my luck then! I bought some Chaeto a couple of weeks ago so I could start producing pods for an eventual Dragonet... Looks like I got more than I bargained for. Will my snails eventually off them, or will copepods outbreed them, or am I just out of luck for now?
 
Asternia stars?
<a href="http://www.flickr.com/photos/ericksonfamily2011/7372914476/" title="photo by ericksonfamily2011, on Flickr"><img src="https://farm9.staticflickr.com/8158/7372914476_77a9e71126.jpg" width="500" height="439" alt="photo"></a>

And what is this pink thing that has grown white on it?
<a href="http://www.flickr.com/photos/ericksonfamily2011/7372908406/" title="photo by ericksonfamily2011, on Flickr"><img src="https://farm6.staticflickr.com/5446/7372908406_f2d32155a2.jpg" width="404" height="500" alt="photo"></a>
 
Biocubehqi said:
Asternia stars?
<a href="http://www.flickr.com/photos/ericksonfamily2011/7372914476/" title="photo by ericksonfamily2011, on Flickr"><img src="https://farm9.staticflickr.com/8158/7372914476_77a9e71126.jpg" width="500" height="439" alt="photo"></a>

And what is this pink thing that has grown white on it?
<a href="http://www.flickr.com/photos/ericksonfamily2011/7372908406/" title="photo by ericksonfamily2011, on Flickr"><img src="https://farm6.staticflickr.com/5446/7372908406_f2d32155a2.jpg" width="404" height="500" alt="photo"></a>
Click to expand...

Asternia yes, pink dunno but maybe someone else does. Reminds me of my pink sponges....but the white part throws me off.
 
The pink almost looks like sponge I have that started out white (or grew over a white one LOL). The white tips is weird, though. Maybe a type of coralline that's bleaching a bit? Is it hard or soft?
 
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