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Old 12/08/2009, 10:43 PM   #1
"Umm, fish?"
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Live rock hitchhikers



The tree-looking thing, maybe some sort of colonial worm?

But there's also this crustacean(?), it looks like it's filter feeding off the pinnate antennae. (What a pose.) And there's an amphipod above it.



I hope you enjoy!


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Old 12/09/2009, 06:25 AM   #2
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There are some amazing and bizzare things out there. How big would you say it is?


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Old 12/09/2009, 07:15 AM   #3
"Umm, fish?"
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Well, that's sand that it's building with, so pretty small. But it's still big enough to see pretty easily. An inch or so, probably.


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Old 12/09/2009, 07:43 AM   #4
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i think the first thing is a spaghetti worm...they eat detritus..I have no idea what the brown shrimp looking thing is


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Old 12/09/2009, 08:55 AM   #5
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I would think spaghetti worm, but aren't they sand sifters? Do they build permanent structures up into the water column?


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Old 12/09/2009, 10:26 AM   #6
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And we have an answer:

Quote:
The tall structure is a foraminiferan. They are acellular organisms that build a skeletal structure out of sand grains. In some tropical areas these are often found near sponges and build their structures out of sponge spicules. They have the name of "spicule trees."

The crustacean in the adjacent tube is indeed a filter feeder. It is also an amphipod.

These sorts of critters are common in the real world, pretty uncommon in tanks.
From Ron Shimek: http://forum.marinedepot.com/Topic10....aspx?Update=1


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Old 12/14/2009, 10:07 PM   #7
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this is awsome!


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Old 12/19/2009, 11:40 AM   #8
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this is one of my favorite things about reef systems and why i can just sit and stare at the display forever. You never know what you may see.


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Old 12/19/2009, 09:25 PM   #9
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Gosh that is totally wild


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Old 12/20/2009, 12:06 AM   #10
"Umm, fish?"
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Got a different ID on the funky sand-skeleton thing. Leslie (the worm wrangler) thinks its from a genus (Lanice) of sand-skeleton building worms.

Some information on those:

Here's a scientist's experimental tank with them:

http://www.marinespecies.org/aphia.p...mage&pic=12186

and a picture of the worm, removed from the tube:

http://upload.wikimedia.org/wikipedi...conchilega.jpg

And Leslie's comments are here: http://forum.marinedepot.com/Topic10....aspx#bm105094


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Old 12/20/2009, 08:12 AM   #11
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Let me start by saying RC is awesome! I've been trying to identify that worm for the last month or so with no pictures. I have the same Lanice Conchilega worm in my tank. I thought it was a piece of something from my arm but when it started moving I couldn't believe it. Thanks for the ID!


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