Stephanie Jarvis of Austin holds a shell known as a sundial she found during a guided beach walk near Horace Caldwell Pier on Friday, July 23. At left, Shirley Fischer points out certain features of the shell. Fischer regularly leads beach walks in which participants can learn about the treasures that wash ashore along our island’s beaches. The Port Aransas Parks and Recreation Department offers the walks for visitors and residents alike on the fourth Friday of each month. STAFF PHOTO BY DAN PARKER