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Reef Hitchhiker ID Need an ID? Have a cool hitchhiker? Good critter ID links and pictures? Post it all here.

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Old 05-14-2007, 08:26 PM   #1 (permalink)
Triggerjay
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two ID's...

First, a small sponge looking critter, but he is no sponge. It kind of looks like a pineapple. White in color, and at night extends into a wormlike creature that is 4 to 6 inches long. When light is shined on it, it retracts in a pulsing manner until it is small again. It is about the size of a pencil eraser when retracted, but gets real skinny when extended. These photos are blurry, but it shows it when in the retracted state. I took about a hundred pics of it, and this is the best one. Is it good or bad? heres the pic :

And another one:


and here is the second one. I have never had these before, but I think I already know what it is.. aptasia? I have two of them aquired on a new mushroom rock:


And here is another pic I just took. I had to post it. I think its the best pic I have ever taken with this camera.. Not a hitchiker, just a new pic:


Thanks in advance for the ID's..

Jason
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Old 05-14-2007, 08:30 PM   #2 (permalink)
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Re: two ID's...

Yup on aiptasia...I think that IS a sponge but could be wrong...
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Old 05-14-2007, 09:17 PM   #3 (permalink)
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Re: two ID's...

Jason! try the magnifying trick for the sponge thingie
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Old 05-14-2007, 09:21 PM   #4 (permalink)
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Re: two ID's...

lol, I will have to buy one. I will move the rock close to the glass and see if I can get a better pic. I will be in there anyways tonight to kill some aptasia. How does the Kalkwasser paste thing work?

Jason
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Old 05-14-2007, 09:33 PM   #5 (permalink)
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Re: two ID's...

I can't tell anything from your pics, but your description of the first creature suggests a peanut worm to me.
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Old 05-14-2007, 10:36 PM   #6 (permalink)
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Re: two ID's...

Some better pics... This is one of it retracted:


And here is one while it is starting to extend. It will extend 6" or more at it fullest, and looks like a thread with a few knots in it.. but retracts to the size of the pic above during the day..


I left it by the glass, and after the lights go out I will try to get a pic of it fully extended... Thanks for all the help guys! Hope these pics give a better idea..

Jason
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Old 05-14-2007, 10:46 PM   #7 (permalink)
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Re: two ID's...

Quote:
Originally Posted by reefjitsu View Post
I can't tell anything from your pics, but your description of the first creature suggests a peanut worm to me.

I cannot find a peanut worm that looks anything like this.. All the ones I found pics of are smooth in appearance, and brown. Mine is white, and when extended, looks like a thread with tons of knots tied in it. But it sounds as though a peanut worm acts the same way... but I cannot find anything about them "pulsing" to retract..

Jason
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Old 05-14-2007, 10:49 PM   #8 (permalink)
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Re: two ID's...

It looks like a tiny cuke to me.
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Old 05-14-2007, 10:58 PM   #9 (permalink)
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Re: two ID's...

It is attached to the rock.. always in the same place. A cuke is free roaming isnt it? Thanks

Jason
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Old 05-15-2007, 03:06 AM   #10 (permalink)
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Re: two ID's...

Got some video. I also have more than one. I counted a total of four in different places in the tank. The first video is of the one pictured above. The focus goes nuts for a second in the video, but then it gets real clear. It retracts near the end of the video. Heres that one:


It is something I have never seen. I tried to look it up, but have no idea where to start. I also saw one attacking a bristle worm with the end of the string thing. At this point I am clueless.. The vids look like something from a monster movie. lol.. Heres vid #2. This one is in a different location, on a different rock between my mushrooms. I just need to know what they are, and if they are good or bad? Thanks again..


Sorry about the shakyness.. I was holding the flashlight and filming.

Jason
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Old 05-15-2007, 04:21 AM   #11 (permalink)
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Re: two ID's...

Hmmm, it is definately not a peanut worm. I'm not really sure what it is, not even really sure what kind of organism it is. A real whatsit.
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Old 05-15-2007, 09:37 AM   #12 (permalink)
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Re: two ID's...

Have I discovered a yet UNdiscovered creature? We will call it the Jason worm! lol... really though. I wish I knew what it was... The ones I found are near some of my corals..Thanks again

Jason
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Old 05-15-2007, 12:24 PM   #13 (permalink)
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Re: two ID's...

I e-mailed all the ifo on it to Bob Fenner... maybe he can figure it out. I tried looking it up on the web, but what in the heck do I look for? lol

Jason
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Old 05-15-2007, 12:32 PM   #14 (permalink)
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Re: two ID's...

At first I thought it was just the arm of some kind of brittle star, but the way it retracts has worm written all over it.
I definitely like the video identification. I'm going to start asking for vids instead of pics.

p.s.- he didn't seem to like the movie sound affects.
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Old 05-15-2007, 03:02 PM   #15 (permalink)
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Re: two ID's...

I forgot to turn off the sound on the camera! lol..No word yet from Bob Fenner. I would say with the amount of E-mails he recieves, it may be weeks... I will keep poking around on the net and see if I can find something like it..

Jason
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