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

here's some I'd LOVE to know what they are. All three came in on the same piece of live rock.





You've gotten some of the coolest hitchhikers I've seen so far. The squat lobster is really cool.


like to share this critter, found on some zoas on my lfs. I have no ID. lot of crabs in the sea...

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This is the prettiest crab I've seen so far. Can you post more pics of it from another angle?
 
Pix & ID: Critters that come in your rocks: the good and the bad.

ImageUploadedByTapatalk1402675864.212716.jpg

Here's a zoa rock I got from a friend and it's infested with bristle and fire worms


And aiptasia
 
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These two hitchhikers have just shown up after re-scaping my tank. They are in the middle, far from a good photo vantage point and they are very small. One is sort of round, red, and it fluoresces under actinics...I'm wondering if it is red bubble algae or something else. The others, and there are several on the same rock, look like feather dusters. They have a striated pattern and duck back in if they are disturbed but they don't look like aiptasia to me. They are really small. Are they pests? I have already used the closeup mode on my camera.

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I put some hardy coral frags in my newly cycled tank yesterday. This morning I saw a small hitchhiker about the size of a large ant crawling over one of the corals. I have taken a pic but dont have it with me right now. I suspect, I did not capture enough details, so I am just going to post some observations and you can help me identify it.

1. It moved relatively fast compared to a snail, more like an ant on a table top.
2. It has 2 small antennae.
3. Size is about 5mm.
4. Grey color.
5. Locomotion is like a worm.
 
Eunice worm is my best guess, from my experience with that one, it enjoys eating zoas, mushrooms, tridacnas and fungias

took a few sleepless nights to figure out where it was hidding
 
I just got my tank up and running and bought so live rock and put my sand in this weekend. I'm pretty sure one of the pieces of live rock has an aiptasia on it but thought I would ask you fine people. Sorry for the crappy pictures they are off my iphone.
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