Atrina serrata - Wikipedia

i Love Learning About Pen Shell Pearls

Bivalves: Pen Shell — Yeesan Loh

Half-naked Pen Shell: Atrina seminuda (Lamarck, 1819)

Atrina seminuda - Wikipedia

Atrina pen shell bivalve (Algiers Beach, Sanibel Island, F…

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

Sawtooth Pen Shell (Atrina serrata Sowerby, 1825): Show Your Teeth

A Rare Find — NCMG

Pen Shells of the Pinnidae Family

Pinna rudis (Rough Pen Shell) - Atlantis Gozo