Fascinating, thank you

I didn't see that photo in your link, what was your source?

I did a reverse image search, lots of reddit hits and some Twitter etc..

https://tineye.com/search/104a8696ad9e2a9ddbcadc5294e2fdf545757929?sort=score&order=desc&page=2

This reddit thread

https://www.reddit.com/r/pics/comments/llal0v/skeleton_of_a_puffer_fish/

https://www.deepseanews.com/2018/12/you-should-definitely-know-about-pufferfish-skeletons/

has a post which mentions the photographer

"Credit to the photographer, duy.ng_skeleton on Instagram".

https://www.reddit.com/r/pics/comments/llal0v/comment/gnorhdj/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

I see lots of skeletons on his account but not this particular photo.

https://www.instagram.com/duyngskeleton/

Too lazy to do more.