I am deeply disappointed there is no scale! How big is that clam? I found an better photograph showing human scale:

https://reefs.com/magazine/aquarium-invertebrates-a-look-at-...

I don't know why I read all of this but it was fascinating.

It was the domain name that did it for me.

And I got a good laugh out of the blog name: "Clamsplaining"

If you really dont know why - https://en.m.wikipedia.org/wiki/Novelty_seeking

I read through the whole thing and found out it was a fundraising pitch: a way to get a few clams from the system. At that point I decided to clam up (even though I realised that made me a little shellfish)...