Manatee by Kunihiko Kasahara

Diagrams in Cute! Cool! Beautiful! Animal Origami Book by Kunihiko Kasahara
Folded from a square of Tant paper

Manatee by Manuel Sirgo

Diagrams in Origami Bugs and Beasts by Manuel Sirgo
Diagrams in PapiroInsectos y Otros Origamis Exoticos by Manuel Sirgo
Folded from a square of origami paper

West Indian Manatee by Michael G. LaFosse

Diagrams in Origami Art by Michael G. LaFosse and Richard L. Alexander
Wet-folded from a square of art paper