WIP - 6 Species - Fem the tiny Mermaid - Ver01 (Patreon)

A little Work In Progress sketch of Fem, my OC who is normally a tiny mermaid, instead drawn as 6 different species.Suggestions given via my Discord server.  Sketched on my new tablet as I'm trying to doodle more than play video games. I will ink and color later, but need to finish a commission first.Anyhoo,Can you guess the 6 species~?~Matt S.