Common Goldfish
Designed: 2006
Diagrams: Origami Nature Study
This model was inspired by the goldfish designs by Ronald Koh featured in his book "Origami Goldfish". The base here is not the same as any of those designs, but the final outcome is quite similar.
The exact shape of this goldfish is based upon the ones at my home which have a surprisingly long tail relative to others you find while doing a quick internet search of "common goldfish".