Happy as a clam: Dive with the world's largest bivalves, or just kick back, in Fiji fair. Jordan Riefe / Monique De Caro Consider the giant clam. A simple bivalve of two equal shells connected by a ...

Snorkeling amid the tree-tangled rock islands of Ngermid Bay in the western Pacific nation of Palau, Alison Sweeney lingers at a plunging coral ledge, photographing every giant clam she sees along a ...