Mermaid by Daniela Carboni

Diagrams in Origami 2D - QQM 59 by Daniela Carboni
Folded from a square of duo origami paper

Mermaid by Fernando Gilgado Gomez

Diagrams in Papiroflexia Magica by Fernando Gilgado Gomez
Folded from a square of Kathy Stevick's tissue-foil

Mermaid by Seiji Nishikawa

Diagrams in NOA Magazine 193
Diagrams in Origami USA Convention 1992
Diagrams in Quarterly ORU Folding Diagrams - Vol. 1
Diagrams in Works of Seiji Nishikawa by Seiji Nishikawa
Folded from 2 squares of Japanese Foil

Mermaid by Yamada Katsuhisa

Diagrams in NOA Magazine 492
Diagrams in Origami Dinosaurs by Yamada Katsuhisa
Folded from a square of Kathy Stevick's tissue-foil