Marmion Marine Park

Marmion Marine Park is a protected marine reserve between Trigg Island and Burns Rocks featuring limestone reefs, underwater caves, and shallow lagoons that extend roughly 5 kilometers offshore. The park includes designated areas for snorkeling, diving, fishing, and whale watching, with access points at Hillarys Boat Harbour and Ocean Reef.

The park was established in 1987 as Western Australia's first marine protected area, named after a historical figure who operated a whaling station in the region. This creation marked a turning point in recognizing the need to safeguard coastal marine ecosystems.

The Whadjuk Aboriginal people maintain an active presence through co-management with local authorities, keeping their maritime traditions alive in the park. Visitors can learn about this ongoing stewardship while exploring the reefs and coastal areas.

The best time to snorkel and dive is during calm conditions in the warmer months when visibility is good. Plan your visit around tides and water conditions, with easy access from two main boat harbors along the coast.

A warm ocean current called the Leeuwin Current brings tropical fish species to this southern location, allowing them to coexist with resident dolphins and sea lions. Meanwhile, humpback whales pass through the park seasonally during their annual migration.