Guppy by Makoto Yamaguchi

Diagrams in Cute Animal Origami by Makoto Yamaguchi
Folded from a square of decorative origami paper

Guppy by Meng Weining (212moving)

Diagrams in One Water One World
Folded from a square of Shadow-Fold paper

Marlin by Miyajima Noboru

Diagrams in Origami Tanteidan Magazine 89
Folded from a square of Wausau papers' Gun Metal Pearlescent Swirl Paper

Moorish idol by John Montroll

Diagrams in Origami Symphony No. 4: Capturing Vibrant Coral Reef Fish by John Montroll
Folded from a square of duo origami paper

Mudskipper by Seo Won Seon (Redpaper)

Diagrams in Creative Origami by Seo Won Seon and Lee In Kyung (Red and White Paper)
Wet-folded from a square of double-sided mulberry paper

Parrotfish by John Montroll

Diagrams in Sea Creatures in Origami by John Montroll and Robert J. Lang
Folded from a square of vellum

Pennant coralfish by Ikuno Riku

Diagrams in Tanteidan 25th convention
Folded from a square of origami paper

Pennant coralfish by Tsuruta Yoshimasa

Diagrams in ORCA Works
Folded from a square of Duo sandwich paper tissue-foil

Perch by John Montroll

Diagrams in Origami Under the Sea by John Montroll and Robert J. Lang
Folded from a square of patterned origami paper

Piranha by Jun Maekawa

Diagrams in Origami El Mundo Nuevo by Kunihiko Kasahara
Diagrams in Doctor's Origami Dream Book by Toshikazu Kawasaki
Folded from a square of patterned origami paper