Cerithium atratum (Born, 1778) Dark Cerith Apparent Mating Aggregation

    Photographed by Linda Ianniello while SCUBA diving at Lake Worth Lagoon near Peanut Island, Palm Beach Inlet, Palm Beach Co., Florida 8/18/2015. Digital image copyright 2015 by Linda Ianniello. The photographer reported that there were five groupings of ceriths in the same general area.