Park The Lalang-garram / Horizontal Falls Marine Park is jointly managed by the Government of Western Australia's Department of Biodiversity, Conservation and Attractions (formerly the Department of Parks and Wildlife (DPaW)) via its agency, the Parks and Wildlife Service and the traditional owners of the land and waters, the Dambimangari (Worrorra) group. The Dambimangari people chose the name "Lalang-garram", being a Worrorra word meaning “the saltwater as a spiritual place as well as a place of natural abundance”, relating to the ocean in a general sense. The Horizontal Falls are known as Garaanngaddim by the Dambimangari, and the Lalang-garram / Horizontal Falls and North Lalang-garram Marine Parks lie within their native title determination area. The two marine parks were declared by the Government of Western Australia. New marine park An 2016 management plan saw this park, along with the Lalang-garram / Camden Sound Marine Park and the North Kimberley Marine Park make up part of what was to be named the Great Kimberley Marine Park, covering about of coastal waters from west of Ganbadba (Talbot Bay) to the Northern Territory border. In 2020, a new management plan was released, titled Lalang-gaddam Marine Park: Amended joint management plan for the Lalang-garram / Camden Sound, Lalang-garram / Horizontal Falls and North Lalang-garram marine parks and indicative joint management plan for the proposed Maiyalam Marine Park. It was published ahead of the gazettal of the proposed Maiyalam Marine Park under the CALM Act as a Class A reserve. Under the new arrangements, the zoning of the Camden Sound park would not change, but the plan is now to amalgamate the four marine parks (Lalang-garram / Horizontal Falls Marine Park, North Lalang-garram Marine Park and the new Maiyalam Marine Park) to form the Lalang-gaddam Marine Park, all in the sea country of the Dambeemangarddee people. This plan will be amended by another 10-year final joint management plan. The new Maiyalam Marine Park will add to the Kimberley marine reserves. The larger plan is to create a total of of new national and marine reserves in Western Australia. The new spelling, "Lalang-gaddam", reflects the correct pronunciation of the word, and "Maiyalam" means "between islands", or "a gap through". The new Maiyalam Marine Park covers an area off the north-western coast of King Sound and around Macleay Island. The new Lalang-gaddam Marine Park borders the proposed Mayala Marine Park to the west (covering the Buccaneer Archipelago),