Blue crab
Crustaceans | Robert J. Lang |  Origami Sea Life by John Montroll and Robert J. Lang (read full review)
| 162 | Square | 
Folded by Nicolas Terry |
Blue crab
Crustaceans | Robert J. Lang |  Origami Under the Sea by John Montroll and Robert J. Lang (read full review)
| 102 | Square |
Folded by Nicolas Terry |
Crab
Crustaceans | Robert J. Lang |  CDO convention 1986 | 68 | Square | 
Folded by Gabriel Vong |
Crab
Crustaceans | Robert J. Lang |  Origami Zoo by Robert J. Lang and Stephen Weiss (read full review)
| 156 | Square |
Folded by Gabriel Vong |
Fiddler crab
Crustaceans | Robert J. Lang |  AEP convention 2005 | 187 | Square | |
Fiddler crab
Crustaceans | Robert J. Lang |  Bogota Origami Convention 2014
| 151 | Square | |
Fiddler crab
Crustaceans | Robert J. Lang |  Creased Magazine 8 | 38 | Square
Crease pattern | |
Fiddler crab
Crustaceans | Robert J. Lang | Origami Sea Life by John Montroll and Robert J. Lang (read full review)
| 169 | Square | 
Folded by Magali |
Fiddler crab
Crustaceans | Robert J. Lang |  Sea Creatures in Origami by John Montroll and Robert J. Lang (read full review)
| 97 | Square |
Folded by Magali |
Freshwater crab
Crustaceans | Robert J. Lang |  BOS Convention 1986 Spring | 12 | Square |
Folded by Gabriel Vong |
Freshwater crab
Crustaceans | Robert J. Lang |  Origami USA Convention 1986 (read full review)
| 100 | Square |
Folded by Gabriel Vong |
Hermit crab
Crustaceans | Robert J. Lang |  CDO convention 2003 | 28 | Square | 
Folded by Nicolas Terry |
Hermit crab
Crustaceans | Robert J. Lang | Origami Sea Life by John Montroll and Robert J. Lang (read full review)
| 157 | Square |
Folded by Nicolas Terry |
Hermit crab
Crustaceans | Robert J. Lang | Sea Creatures in Origami by John Montroll and Robert J. Lang (read full review)
| 92 | Square |
Folded by Nicolas Terry |
Horseshoe crab
Arachnids - Horseshoe Crabs | Robert J. Lang | Origami Sea Life by John Montroll and Robert J. Lang (read full review)
| 153 | Square | 
Folded by Nicolas Terry |
Horseshoe crab
Arachnids - Horseshoe Crabs | Robert J. Lang | Sea Creatures in Origami by John Montroll and Robert J. Lang (read full review)
| 88 | Square |
Folded by Nicolas Terry |
