Help on a ID

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11f150

Aquarium Advice Regular
Joined
Feb 9, 2012
Messages
52
Have a few sets of these. Looks like 4-5 tentacles per set. Seems the body of this stays inside the rock and only the tentacles reach out. Very hard to get a good picture of them, they only come out when its dark in the room.

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looks like brittle star fish, I have a couple myself, took me a while to figure out what they were, although mine never put more than two tentacles out at a time, I eventually got a bright Led flashlight and looked into one of the larger holes and saw that the tentacles were joined.
 
I have these aswell mine stick out three arms from the crack and wave them around as if they are catching food. I believe they are bristle stars aswell
 
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