Sawtooth Pen Shell (Marine Invertebrates of Jekyll Island, GA) · iNaturalist

File:Atrina sp. (pen shell) on marine beach (Cayo Costa Island, Florida, USA) (24327570435).jpg - Wikimedia Commons

Photos of Amber Pen Shell (Pinna carnea) · iNaturalist

Photos of Noble Pen Shell (Pinna nobilis) · iNaturalist

Photos of Amber Pen Shell (Pinna carnea) · iNaturalist

INS009-00123 - Joel Sartore

A Needle in a Coastal Haystack

Photos of Stiff Pen Shell (Atrina rigida) · iNaturalist

Atrina serrata, 30 November 2013 (ii) – floridensis

Photos of Pearl Kite (Gampsonyx swainsonii) · iNaturalist

Photos of Stiff Pen Shell (Atrina rigida) · iNaturalist

Photos of Cart-Rut Shell (Dicathais orbita) · iNaturalist

professor fish heads: The magnificent Pen Shell

Photos of Amber Pen Shell (Pinna carnea) · iNaturalist