The calcareous green alga Halimeda is a major contributor to inter-reef carbonate sediments and is found along the northern Great Barrier Reef shelf as extensive build-ups of sediment, called bioherms. Halimeda algae meadow (credit Emma Kennedy)These Halimeda bioherms...

Crowdsourced bathymetry is the collection of depth measurements from vessels using standard navigation instruments. Many vessels on the Great Barrier Reef - from dive boats to fishing boats - use some type of echo sounder to measure the depth of water. Combined with...

Submarine canyons are among the largest undersea landscape features on Earth, and act as pathways for most of the terrigenous and carbonate sediment transported from the continents to the deep-sea. Canyons are typically associated with large submarine fans and gravity...