An Unusual Mermaid (Patreon)

Usually fish-tailed or dolphin-tailed, this mermaid is unique!  Nudibranchs are a group of soft-bodied marine gastropod molluscs that shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to match, such as "clown", "marigold", "splendid", "dancer", "dragon", and "sea rabbit".

Source images are from Wikimedia