Origami 2 in 1: "On the water" AND "Under water" (Herman van Goubergen)
Herman van Goubergen created this 'two in one'-origamimodel in 1995-1996. When you look at the top, it's a swan (see photo left), but when you turn it around you see a fish (see photo right) ;-)) It's one of his models belonging to what he mentions "Mirrorigami".
Model: 2 in 1: "On the water" AND "Under water"
Design by Herman van Goubergen
Diagrams can be found here.