Scallop shell Sammy's Beach
Short Drop-Off, Palau
Fishermen harvest these oysters during spring tides when the river falls to its lowest level. This was photographed at the last bend of Rio Jama before it empties into the Pacific Ocean..
Mangrove oyster. Found growing on prop roots.
This is from a photoset I took of shells I've collected around Catalina Island over the years.