Macroalgae-dominated subtidal reefs
Port Phillip Heads: Information is only available for marine national parks and sanctuaries. Subtidal reefs in the Port Phillip Heads Marine National Park are healthy – with the exception of decreasing numbers of seastars and an increasing risk of invasive marine species. Kelp has been replaced by purple sea urchin barrens, coralline algae and filamentous brown algae at Point Cooke Marine Sanctuary, while kelp has also declined at Jawbone and Ricketts Point marine sanctuaries.
Other Marine and Coastal Areas: Information is only available for marine national parks and sanctuaries. Brown algae communities on subtidal reefs are in ‘good’ condition in 14 parks and ‘fair’ in three.