Franco Banfi / Pen shell (Pinna nobilis) in seagrass meadow of Nepture grass (Posidonia oceanica), Ischia Island, Italy, Tyrrhenian Sea, Mediterranean
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LYNN M. STONE / Common Florida sea shells in sea foam at edge of surf. Lightning Whelks (brown lengthwise stripes), Pen (lavender blue), Tulips (whorled tan striping), et. al.. Tarpon Springs, Florida, USA.