| Oregonia bifurca | |
|---|---|
| |
| Male | |
| |
| Female | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Family: | Oregoniidae |
| Genus: | Oregonia |
| Species: | O. bifurca
|
| Binomial name | |
| Oregonia bifurca Rathbun, 1902
| |
Oregonia bifurca, commonly known as the split-nose crab or the split-nose decorator crab, is a species of crabs belonging to the family Oregoniidae. It is a rare deep-water species that inhabits the tops of seamounts and guyots in the northeastern Pacific Ocean; from the Aleutian Islands, the Bering Sea, the Hawaiian–Emperor seamount chain, to the waters off British Columbia. It is closely related to the more common shallow-water species Oregonia gracilis, the graceful decorator crab.
Like other majoid crabs, Oregonia bifurca are sexually dimorphic, with males larger than the females. The carapace length is about 33.7 millimetres (1.33 in) in males and 29 mm (1.1 in) in females. The entire body and the long and slender legs are covered densely with curving yellow hair.