I shelled Marco Island , Fla every few days for a year. Here's a partial list:
Atrina serrata
Atrina rigida
Dinocardium robustum vanhyningi
Tellidora cristata
Tellina alternata
Tellina lineata
Noetia pondersosa
Laevicardium mortoni
Argopecten gibbus
Donax variablis
Spisula solidissima similis
Mercenaria campechiensis
Dentalium eboreum
Marginella apicinum
Erato maugeriae
Cerithium muscarum
Terebra dislocata
Cerithidea costata
Diodora dysoni
Chicoreus florifer
Murex pomum - a pretty distinct ecological form
Urosalpinx cinerea
Bulla striata
 
That's off the top of my head and shoul whet the appetite. Take a shovel and
screens and stay in shallow water. Of course the Busycons are there.
Good luck
Ken White  pharmer [log in to unmask]