Stiff Pen Shell: Atrina rigida (Lightfoot, 1786)

ATLANTIC PEN SHELL 7 INCHES Pawleys Island Seashell for Collectors Beach Decor

Pinnidae - Pen Shells

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

Pen Pearls Information

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

Seashells by MillhillThe Interesting Iridescent Pen Shell

Pen Shell (Large Saltwater Clam) when broken has this gorgeous rainbow, Marine Biology

Iridescent Pen Shell Photograph by Debra Martz - Pixels

Pinna nobilis - Wikipedia

Still pen shell Shell art, Pen shell, Shells