Two days shelling at Sanibel ! Wonderful beachcombing at low tide : so many sea shells

During december 2014, we spent two days at Sanibel, one of the best beachcombing spot in the world ! We should have stayed more than 2 days ! Only one low tide beachcombing will stay one of our best memory from Florida ! We saw a women finding a junonia just in front of us ! 
More images there : http://www.seashell-collector.com/articles/general_articles/page_2-days-at-sanibel-island-florida-extreme-low-tide.html

We found :
« tulip shell »  Fasciolaria tulipa Linnaeus 1758
« lightning whelk» Busycon perversum (Linnaeus, 1758)
« lace murex » Chicoreus (Triplex) florifer (Reeve, 1846)
« apple murex » Phyllonotus pomum (Gmelin, 1791)
« lettered olive » Oliva sayana Ravenel, 1834
« stiff pen shell » Atrina rigida (Lightfoot, 1786)
"fighting conch" Strombus alatus Gmelin, 1791
« Atlantic giant cockl » Dinocardium robustum Lightfoot, 1786