Beachcombing - Pen Shells

American Stiff Pen Shell (Atrina rigida Lightfoot, 1786): Byssal Threads

Pinnidae - Pen Shells

M-650 PEN SHELL, Atrina rigida or A. serrata - Gulf Specimen Marine Lab

Stiff Pen Shell Large Atlantic Ocean North Florida Atrina Rigida

Rough pen shell, Pinna rudis

Stiff Pen Shell (GTM Research Reserve Mollusc Guide) · iNaturalist

Jekyll Island - #WildlifeWednesday: Rigid pen shells are also called stiff pen shells. The insides of these fan-shaped shells are smooth and shiny, like mother-of-pearl, while the outside is covered with rough

The comb pen shell Atrina pectinata (Linnaeus, 1767) here shown with a

Iridescent Pen Shell Photograph by Debra Martz - Pixels

11,927 Pen Shell Images, Stock Photos, 3D objects, & Vectors