Camden Sound is a drowned valley, formed as sea levels rose at the end of the last ice age, flooding the western end of the MacDonald Range. The islands scattered across the sound are remnant peaks, emergent features of basalt and sandstone that once stood as hills above a river plain. The geology creates an underwater topography of sheltered bays and shallow reefs ideal for marine life. Most dramatically, the Kimberley coast's extreme tidal range, reaching up to 11 meters, transforms the seascape twice daily. Montgomery Reef, at the sound's southern edge, appears to rise from the ocean as the tide drops, water cascading off its plateau in waterfalls that attract manta rays, turtles, and reef sharks to the feast of marine life exposed along its edges.

Each winter, the Breeding Group D population of humpback whales migrates from Antarctic feeding grounds to the warm, sheltered waters of Camden Sound. At roughly 22,000 individuals, this is the world's largest humpback population, and the sound serves as their primary breeding and calving ground. The warm, relatively shallow waters provide ideal conditions for newborn calves, which lack the blubber to survive colder seas. Mothers and calves linger in the sound for weeks, the calves gaining strength and weight before beginning the long southern migration. The concentration of whales transforms the sound during calving season into one of the great wildlife spectacles of the Southern Hemisphere, though the area's remoteness, some 300 kilometers northeast of Broome, means that few people witness it firsthand.

Aboriginal peoples fished and traveled these waters for tens of thousands of years before Captain Phillip Parker King sailed HMS Bathurst into the sound on 15 August 1821, naming it Camden Bay after John Pratt, 1st Marquess Camden. A short-lived colonial settlement, Camden Harbour, was established within the sound but quickly failed. The land and sea endured. Three native title groups, the Dambimangari, Uunguu, and Mayala, hold registered claims over the marine park area, with the Dambimangari claim covering the majority. Their relationship with the country is not historical in the past-tense sense; it is ongoing, active, and central to how the marine park is managed today.

The Lalang-garram / Camden Sound Marine Park, gazetted as the first jointly managed marine park in Australia, covers 7,062 square kilometers and is Western Australia's second-largest marine park after Shark Bay. What makes it distinctive is not just its size but its governance: the park is managed jointly by the Western Australian government and the Dambimangari traditional owners under an arrangement that aligns conservation science with Indigenous custodianship. The conservation objectives overlap more than they diverge. Both parties want the saltwater country to remain healthy. Both want no species to go extinct. A whale sanctuary zone of approximately 1,067 square kilometers sits at the park's core, with sanctuary zones around Champagny Islands and Montgomery Reef. Nearly half the park is closed to trawling and almost a quarter to commercial fishing. A 2020 management plan laid the groundwork for amalgamating Camden Sound with three neighboring marine parks into the larger Lalang-gaddam Marine Park, a name that corrects the pronunciation of the Worrorra word and would create one of Australia's largest contiguous marine protected areas.

From the air, Camden Sound resolves into a mosaic of turquoise shallows, deep channels, and island silhouettes scattered like puzzle pieces across the Indian Ocean. The pearl industry once worked these waters, and a dedicated pearling zone still exists within the marine park. But the sound's future is increasingly defined by conservation rather than extraction. The plan to create 5,000,000 hectares of new national and marine reserves across Western Australia places Camden Sound at the center of an ambitious vision. For the Dambimangari people, who chose the name Lalang-garram because it speaks to both the spiritual and the abundant, the sound has always been a place where the land and sea are not separate things but aspects of a single, breathing country.