I’m glad you mentioned this, because this is also one of my niche collections! I love finding traces of real animals in pokemon media. Here is a post I made a bit ago documenting as many cards that I (and other community members) could find with Animals on Pokemon cards!
https://www.elitefourum.com/t/animals-in-pokemon-cards/33124
(once you include coral, you are opening pandora’s box 
)