What the hell is this!?!

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Okay, I found it or another one and took a better picture of it. Again, I was with customers, and couldn't really camp out until I got "The Shot", but it certainly is better than the original.

thing.jpg


You can see something just to the left of the "slime strand" where it meets the "body" that looks like it might be a hinged cap or something that.

thing2.jpg


thing3.jpg
 
I'm gonna guess that it's some sort of dead or dying tunicate ...

... Bob (Grateful Diver)
 
Great! the better pictures clarified it for for me: it's a..............doohickey
 
Okay, I found it or another one
Well, unless it moved to a different place it's a different critter. In the first picture I was really leaning towards a piece of encrusted mono with a weight attached, but this one definitely doesn't look like that.
Never seen anything like it in the wild or in a book...
Maybe it's a Praxillura kevinsii, the "one horned praxillura," or "one blade windmill worm," just waiting for you to describe it.
Rick
 
In looking around for what in the world this could be I did come across something interesting that looks mighty similar...
There is this epibenthic amphipod, Dyopedos monacanthus, that constructs it's own "perch" on which to stand and pick plankton from the passing water - the "perch" and your mystery critter look mighty similar at the base, but D. monacanthus perches are usually standing up/out into the water column, not down, so I don't think that's it :)
Rick

Dyopedosmonacanthus.jpg
 
Probably a sponge! Some sponges spread about by literally dripping off walls and overhangs, they then form new sponges where the drips land. Couldn't tell you which sponge though!
 
Now Ive seen the close ups definitely a sponge... demosponge but cant really tell you more then that without getting a sample....
 
https://www.shearwater.com/products/perdix-ai/

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