I support a group called ERDG (Ecological Research & Development Group, https://www.horseshoecrab.org), which focuses on improving the state of the four remaining Horseshoe Crab species.

For those who don't know - despite being a critical part of our medical infrastructure (their blue blood is the current source for the reagent LAL, which is still used to test most pharmaceuticals & devices for bacterial contamination) they are in steep decline.