Florent's Guide To The

Tropical Reefs

Blue-Eyed Rock Crab
Percnon affine
Blue-Eyed Rock Crab
Category: Spray Crabs
Scientific Name: Percnon affine
Size: Up to 3 in. (7.5 cm)  
Depth: 3-15 ft. (1-5 m)
Distribution: Pacific, Hawaii
Arthropoda (Phylum) Arthropods
└Crustacea (Subphylum) Crustaceans
 └Multicrustacea (Superclass) Typical Crustaceans
  └Malacostraca (Class) Malacostracans
   └Eumalacostraca (Subclass) Decapods, Isopods, and Allies
    └Eucarida (Superorder)
     └Decapoda (Order) Decapods
      └Pleocyemata (Suborder)
       └Brachyura (Infraorder) True Crabs
        └Grapsoidea (Superfamily)
         └Percnidae (Family) Spray Crabs
          └Percnon (Genus)
           └P. affine (Species)
WoRMS ID: 207572🔗
iNaturalist ID: 121798🔗

All Photographs
© 2026 Florent Charpin