Ideas: Mermaid customization

I was just thinking how fleshed out mermaids customization could be and came up with these ideas. I don't think we're getting the needed update to them even though we deserve it, so this is just me sharing ideas for the sake of creativity. 

• Body category:
  - Fins and scales category:

   

• Tail category:
  - Caudal fin category:

   

  - Pattern category: Between them some patterns that don't have scales, like mammals tails.

   

  

   

• Paint mode: