Seashells by MillhillThe Interesting Iridescent Pen Shell

Pen shells (family Pinnidae) are usually gray or brown in color with an iridescent sheen.  They are long and tapered in a triangular shape and most of the ones I've seen were on the east coast beaches in Florida. They can be huge!  My resource book says up to thirty-one inches in length!   But…

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Seashells by MillhillThe Interesting Iridescent Pen Shell

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