Bremer Marine Park, Marine park near Bremer Bay, Western Australia.

Bremer Marine Park is a protected ocean area off the coast of Western Australia, near the town of Bremer Bay, covering both shallow coastal waters and deep open-ocean sections. The park spans a wide stretch of sea that includes underwater canyons and supports a broad range of marine life, from small fish to large predators.

Bremer Marine Park was zoned as a national park under the Australian government's South-west Marine Parks Management Plan in 2018, within the South-west Marine Parks Network. It covers 4,472 km2 and reaches depths of 5,900 m, including the geomorphology of Bremer Canyon, whose currents and eddies drive nutrient upwelling. The food web was studied by the University of Western Australia and the Australian government, which identified the orca as apex predator, squid and krill as keystone species and phytoplankton as the main primary producer.

The park's draw is wildlife watching rather than any documented Noongar tradition: tour boats from Bremer Bay carry visitors to see orcas, and the orca is described as the apex predator of the local food web, with squid and krill as keystone species. The area's popularity rests on this marine biodiversity and the presence of orcas, which support ecotourism and whale watching.

The town of Bremer Bay is the main starting point for accessing the park, and most boat-based wildlife tours depart from there. Whale sightings are more likely at certain times of year, so planning the trip around animal activity makes the visit more rewarding.

The underwater canyons off Bremer Bay generate upwellings that pull cold, nutrient-rich water toward the surface, creating conditions that draw large numbers of marine predators to one place. This makes the area one of the few places in the world where orca sightings are reliably frequent, drawing researchers and wildlife observers from across the globe.