| Percnon planissimum (Herbst, 1804) Flat rock crab | 
|   | 
| photo by 
	Harasti, David | 
| Family: | Plagusiidae () | |||
| Max. size: | ||||
| Environment: | reef-associated; marine; depth range 1 - 6 m | |||
| Distribution: | Indo-Pacific: Somalia to Cocos Islands, the Philippines and Kermadec Islands. | |||
| Diagnosis: | ||||
| Biology: | ||||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. 123251) | |||
| Threat to humans: | poisonous to eat | |||
| Country info: |  | |||