Description
Halimeda is a green macroalgae, that is composed of a string of jointed calcified green segments. They are abundant in shallow seas in the tropics. Substantial Halimeda banks exist inside the Ribbon Reefs passages of the northern GBR but also in the central northern GBR. Dominated by a live veneer of the calcareous green algae Halimeda which dies to forms banks, typically up to 20 metres thick, on the seafloor usually in waters 40 metres or more deep. Their distribution is determined by “a complex interaction of outer-shelf geometry, regional and local currents, coupled with the morphology and depth of continental slope submarine canyons determining the delivery of cool, nutrient-rich water upwelling through inter-reef passages