Florent's Guide To The Florida, Bahamas and

Caribbean Reefs

Stiff Penshell
Atrina rigida
Stiff Penshell
Category: Pen Shells
Scientific Name: Atrina rigida
Size: Up to 11in. (28cm)  
Depth: 6-50 ft. (2-15 m)
Distribution: Bahamas, Caribbean, Florida
Mollusca (Phylum) Mollusks
└Bivalvia (Class) Bivalves
 └Ostreida (Order) Oysters and Allies
  └Pinnoidea (Superfamily)
   └Pinnidae (Family) Pen Shells
    └Atrina (Genus)
     └A. rigida (Species)
WoRMS ID: 420739🔗
iNaturalist ID: 214591🔗

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© 2026 Florent Charpin