Sri Lanka’s coastal waters range from the shallow, turtle-rich reef of Hikkaduwa to the extraordinary Pigeon Island Marine Park near Trincomalee, where blacktip reef sharks, hawksbill turtles, and vibrant coral gardens sit in a few metres of crystal-clear east coast water. Gap Ceylon Travelers arranges snorkelling excursions with qualified operators, provides quality equipment, and briefs guests on responsible marine behaviour. For travellers interested in the full underwater dimension, diving options at Bar Reef Marine Sanctuary and the HMS Hermes wreck off Batticaloa provide Sri Lanka’s most significant diving sites.