Mantis Shrimp -Ermakov
This model only has 104 steps, but don't let that fool you, this guy took forever to fold and I'm probably not going to try him again any time in the near future.
Designed by: Andrey Ermakov
Diagrams: Origami Tanteidan Convention 17
Paper: one 3' square of tracing paper
Time spent folding: 15+ hours
Size: 8" from tail to antennae