Each mermaid in this series is designed to
resemble a specific fish. The Powder Blue Mermaid uses the markings of a
powder blue tang for the tail with some artistic modifications. As the name
implies, the Orca mermaid is fashioned after an Orca (killer whale) which
actually is a marine mammal. One advantage of fantasy art is its
flexibility - you can pretty much do what you want as there are no
limitations to your creativity.