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Alberta-newb
07-11-2008, 01:30 AM
I've done quite a lot of searching but haven't found an ID on this other than references to some sort of "tube polyp" or "stick polyp" which isn't too scientific.

http://www3.telus.net/lucas-mustangs/AQUA/tube-polyp.jpg

The tubes themselves are translucent and fairly rigid and when disturbed, the polyps(?) will quickly retract into them. When I first saw them a couple of months ago the coloration was a pale yellow/brown but have changed to a bright lime green color that really shows well under actinic (off for the photo). Each one is about 2-3mm across when open.

I would imagine this stuff is fairly common as it was a hitchiker and is showing up on a couple of pieces.. would like to know a little more about them.

Thanks,

Francis

marie
07-11-2008, 01:59 AM
I've done quite a lot of searching but haven't found an ID on this other than references to some sort of "tube polyp" or "stick polyp" which isn't too scientific.

http://www3.telus.net/lucas-mustangs/AQUA/tube-polyp.jpg

The tubes themselves are translucent and fairly rigid and when disturbed, the polyps(?) will quickly retract into them. When I first saw them a couple of months ago the coloration was a pale yellow/brown but have changed to a bright lime green color that really shows well under actinic (off for the photo). Each one is about 2-3mm across when open.

I would imagine this stuff is fairly common as it was a hitchiker and is showing up on a couple of pieces.. would like to know a little more about them.

Thanks,

Francis

Hydroids, not something you really want in your tank because they spread quickly and sting anything that happens to grow nearby

http://www.xtalworld.com/Aquarium/hitchfaq.htm

Alberta-newb
07-11-2008, 07:38 PM
Marie, Thanks for the ID! (glad I asked before it spread). The link you provided is an excellent resource for newbs like me.