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Oregonia gracilis
| Oregonia gracilis | |
|---|---|
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| 1855 illustration of Oregonia gracilis by James D. Dana | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Family: | Oregoniidae |
| Genus: | Oregonia |
| Species: | O. gracilis
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| Binomial name | |
| Oregonia gracilis Dana, 1851
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| Synonyms[1][2] | |
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Oregonia gracilis, commonly known as the graceful decorator crab, is a species of crab belonging to the family Oregoniidae.[3] Like other decorator crabs it habitually attaches other organisms to its back.[4] The sessile organisms are attached to hooked setae that act as a sort of velcro attachment. This decoration provides visual and chemical camouflage thus reducing predation risk.[5] Pacific halibut are a major predator of O. gracilis. Other predators include octopus and sea otters. The main food source of O. gracilis is floating kelp and algae that they capture utilizing a waiting strategy in order to maintain cryptosis.[6]
- ^ Rathbun, Mary J. (1925). The Spider Crabs of America (PDF). Bulletin (United States National Museum) 129. Washington: Government Printing Office. pp. 71–79.
- ^ Davie, P. (2012). "Oregonia gracilis Dana, 1851". WoRMS. World Register of Marine Species. Retrieved September 3, 2012.
- ^ Dave Cowles (2005). "Oregonia gracilis Dana, 1851". Walla Walla University. Retrieved January 11, 2012.
- ^ "Cattle Point: Where Fashion Is the Best Defense". Featured Organism: The Decorator Crab. University of Washington. 2004. Retrieved December 13, 2012.
- ^ Berke, Sarah K. & Woodin, Sarah A. (2009). "Behavioral and morphological aspects of decorating in Oregonia gracilis (Brachyura: Majoidea)". Invertebrate Biology. 128 (2): 172–181. doi:10.1111/j.1744-7410.2009.00167.x.
- ^ "Oregonia gracilis: The Graceful Decorator Crab". University of Puget Sound. Retrieved February 20, 2018.
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