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

If it aptasia... bad. Some people like it. but it really is a pest and spreads like wild fire.
 
Help ID'ing a couple of LPS please!

Help ID'ing a couple of LPS please!

In this picture, there are two corals, both are stonies. Any ideas?

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uhh so I got a rock with a BTA nem on it and a few days later this crawled out. Obv not the Zoa colony, the thing right next to it.

for some reason the camera wouldn't focus on it.
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actinic lighting
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the more I look the more I think it's a maxi mini carpet nem. interesting... should probably get him out of my tank since I have 3 bubble tip nems already.
 
New rock from TBS

New rock from TBS

Was wondering if I can get some help on a couple of hitchhikers and some sponge"?" on my new rock.

A brown legged hermit.. is he safe?

Is the snail a whelk or what?

Two different types of red sponge?

This is my second go round with this Biocube 14g. The first time I had a mantis sneak past me and just devastate my livestock. Tank ended up as a crab house with lots of dragon's breath algae that I sold to the LFS. From what I read this go round I am planning on limiting any crabs other than blue legs to the sump and possibly those too after the tank gets settled. Let them clean up for now though.
 

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The hermit will be fine. It'll eat left over food. The snail is a nassarius - beneficial. The other two look like tunicates to me.
 
Need helping IDing something on my mushroom rock. Just noticed it had a string coming out of it!

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Late last year I set up a brackish water Opae Ula (Hawaiian Red Shrimp) tank. In it I put several pieces of live rock with very interesting results. In amongst the critters and algae that survived the transition from marine to brackish conditions is this green something that has grown a lot over the months.

Any idea what it is? At close up it has a very interesting texture not captured in this photo.
 

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Found these on the bottom of the plug that my candy cane coral lives on. I've been having trouble with something eating the stock of the coral but haven't been able to find the culprit. Could this be it? What is it?
 

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Couple more ids please :)

Couple more ids please :)

Looks similar to the pineapple sponge just posted a few posts above???

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And same algae in both shots below. Maybe Halimeda? Thank you.
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THe more I look, the more I think the first pic is a pineapple. Still curious about the macro. I know it's still in it's formative stage and might be hard to id. It's funny, but all the interesting stuff has grown in my sump so far.
 
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