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Old 02-03-2013, 06:31 PM   #1
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Marine Alien

I have aliens in my reef tank and I would be glad if someone can identify it for me. I have 2 of them hiding inside the live rocks. I happen to take a video with my cell but unfortunately it is tilting sideways and i can not edit it. They stretch and shrink like a very elastic rubber band. They come out very seldom and only if no one is watching. It seems it has 3 legs like a star fish with green color. I can only assume they feed on algae. When they come out, 1 of their 3 legs is always attached inside the live rock. When startled they instantly shrink back and hide.
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Old 02-04-2013, 11:03 AM   #2
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very weird - have no idea, but wanted to follow this thread
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Old 02-04-2013, 11:11 AM   #3
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Looks like a brittle star to me.
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Old 02-04-2013, 01:17 PM   #4
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If it is a brittle star, why would it be the opposite because it is not brittle at all. It is very elastic like a bubble gum that can stretch for 12 inches long crawling nearby the rock where it hides without even breaking apart.
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Old 02-05-2013, 09:52 PM   #5
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Here is the link to video

Marine Alien on Reef - note video is tilted sideways - YouTube
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Old 02-05-2013, 10:24 PM   #6
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That's weird!! Not a clue,following along just to see if you figure out what it is
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Old 02-06-2013, 12:02 AM   #7
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Wired looking thing. Some kind of worm I'd guess. Not a spoinid but something like that.
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Old 02-06-2013, 12:10 AM   #8
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That's crazy! If that's just his arms I'd love to see the whole thing! Almost looks like squid feeding tentacles. I'm going to follow along too. More videos please! Can you shine a light in the hole he's in?
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Old 02-06-2013, 12:39 AM   #9
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Good god!!! When it retracts and zips around the rock. That thing is crazy.
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Old 02-06-2013, 12:52 AM   #10
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that looks to be a squid or octopus
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