Florent's Guide To The

Tropical Reefs

Two Horn Box Crab
Calappa bicornis
Two Horn Box Crab
Category: Box Crabs
Scientific Name: Calappa bicornis
Size: Up to 2.5 in. (6.5 cm)  
Depth: 30-200 ft. (10-60 m)
Distribution: Indo-Pacific
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
        └Calappoidea (Superfamily)
         └Calappidae (Family) Box Crabs
          └Calappa (Genus)
           └C. bicornis (Species)
WoRMS ID: 209494🔗
iNaturalist ID: 325326🔗

All Photographs
© 2026 Florent Charpin