Blue Pearl Bay is located on the north-western side of Hayman Island in the Whitsundays Islands. Popular with tourists and locals for snorkelling, diving and sightseeing, Blue Pearl Bay is known for its coral and fish life including a resident Maori Wrasse named Elvis. Day tours and overnight boats visit Blue Pearl Bay for snorkelling and scuba diving. Visitors typically swim directly off their vessel, or tender into the southern beach and enter the water from the coral beach.
Diving depth is from three to 18 metres, and diving visibility is typically from three to 15 metres. The best coral cover to be seen in shallow water off the southern beach, with scattered bommies and a silty sand bottom at five to 18 metres, dropping off to coral rubble and silty sand below 18 metres.
Some of the best diving is off southern beach, near Castle Rock, where a shallow coral ledge (two to three metres) drops off to descend 10 to 15 metres. The wall has narrow canyons and caves making for great exploration. Strong corals near Castle Rock have some striking gorgonian fans at eight to 15 metres below, as well as some whip corals. The shallow waters are predominately staghorn coral, and there is good protection from all winds except north-westerlies.