Myoporum acuminatum, commonly known as waterbush, pointed boobialla or mangrove boobialla, is a flowering plant in the figwort family Scrophulariaceae and is endemic to eastern Australia. It grows in rainforest or wet eucalyptus forest near the coast and in the Coastal Ranges, and is occasionally associated with mangroves. Occasionally it is found in the drier rainforests. It grows naturally as far south as Mimosa Rocks National Park in far south eastern New South Wales, and north to Fraser Island in Southern Queensland.