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https://photos.app.goo.gl/2ozGJC6kNFSLQWLd6
I found this on the beach yesterday, what is it?
The first person I asked turned out to have trypophobia, I am hoping to learn 2 things from this 🙂
Looks like an oyster shell?
A quick Google revealed this :
https://natureinfocus.blog/2009/12/05/sponge-borings-in-flat-oyster-shells/
Which is interesting.
Which is interesting.
More boring really.
Cheers mulacs
Edit - what mulacs said
Could be a very old oyster shell that has suffered chemical and mechanical wear/erosion over time.
I love this place when these kind of threads turn up. Learn a new word and learn something interesting about sponges within the first two posts.
That's the second one. Did you not find the other two?
ooh, I've got a similar thing what I found down at Fawley. Mines more triangular (or, merkin) shaped...

What about this, while we're on a "wot is it?" mode. This appeared on the wall outside my house yesterday. I tried to snort it, but the granules are a solid mass. The patterns around it are most intriguing... (here - https://postimg.cc/Vdm1bnfF for a proper zoom)

The merkin shaped one looks like it's simply a stone that was at one time covered in barnacles. It probably got dislodged from its static position, and the actions of the waves or tumbling around in the surf have rounded them off.
No idea on the other one though.
I've seen loads of those oyster shells around here in Kent with all the holes in the shell, now I know why. Great stuff!👍
.. merkin shaped one looks like a stone that was at one time covered in barnacles.
Yep, pretty sure its that.
I think the wall thing is some kind of brick efflorescence, but why it's appeared there and now and nowhere else on top of that wall... very weird.
I hoped this was going to be about the Red-Nosed Rock Borer (Hiatella arctica).
Silly name for a real creature!
