04-15-2014, 09:46 PM
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Originally Posted by Tazman
Maybe a rare form but I don't think it is an Annelida, I think it is Mollusca -- I don't have all the notes with me due to the paper bomb called taxes. It may be a form of worm snail but that still doesn't seem right.
I'll try to download the new pictures I took today with some high powered lights and different angles -- I almost wish I could draw a picture -- I have a shot I need to review from almost the top (the overhang is less than 1/2 " so this is tricky). It looks somewhat like a reverse horseshoe from the top (but closed) with an opening at the U end -- it looks like it has 2 horns from the side but it doesn't from the front -- it is opens a triangular "mouth" as it comes up to filter feed, and it collapses inward as it pops back in (think of a pie with a slice taken out that closes on the opening). It never moves -- I look at the tank almost every night with a flashlight and it stays home. It also appears Calcerous -- I can't see any soft parts that I can tell.
Today may have given another clue, I believe it released a stringy substance with some tiny particles from it's opening.
It's actually driving me nuts -- I can't find anything that looks like this thing or has a similar description of behavior except the worm snails -- and they form tubes. This guy has possibly been in this tank for up to 10 years and is imbedded in the same spot in the live rock.
I also wish I could cirlce it on the picture. It is more dime size than nickel sized.