From the "Today I learned a new thing" department :

Dyeing the Dead: The Artful Science of #Diaphonization - Atlas Obscura

https://www.atlasobscura.com/articles/dyeing-the-dead-the-artful-science-of-diaphonization

Also spelled #diaphanization because the term comes from diaphanous.

Dyeing the Dead: The Artful Science of Diaphonization

You've likely seen diaphonized creatures on display in natural history museums, where transparent specimens of dead fish, frogs, and snakes float in...

Atlas Obscura