Compared to other reefs around Magnetic Island, Alma Bay has a low percentage of nutrient indicator algae, a low percentage of silt, and high sponge cover. There are large numbers of the solitary coral Fungia fugites. The large colonies of staghorn corals that used to be there are now mostly gone.
(Photo: Fungia fugites courtesy of Wikipedia)
Arcadia Coastcare started out as Olympus Crescent Coastcare, removing weeds from public land in the Olympus Crescent/Alma Bay area, particularly in Alma Creek Reserve. The Olympus Crescent Coastcare Project provides details on the natural values of Alma Creek and Olympus Crescent in 2008.
A Pandanus Fringe
Alma Bay was originally fringed with native Pandanus trees. Recently a few have grown back.