Florent's Guide To The

Tropical Reefs

Heart Urchin Pea Crab
Dissodactylus primitivus
Heart Urchin Pea Crab
Category: Pea Crabs
Scientific Name: Dissodactylus primitivus
Size: Up to 0.5 in. (1.2 cm)  
Depth: 3-130 ft. (1-40 m)
Distribution: Caribbean, Florida, Bahamas
Lives underside of sea urchin Meoma ventricosa
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
        └Pinnotheroidea (Superfamily)
         └Pinnotheridae (Family) Pea Crabs
          └Dissodactylus (Genus)
           └D. primitivus (Species)
WoRMS ID: 422153🔗
iNaturalist ID: 976095🔗

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© 2026 Florent Charpin