Located just off the shore of Lizard Island north of Cairns, Cobia Hole features a jumble of rocks, no bigger than a tennis court, decorated with marine life. With a maximum depth of 18 metres, this rocky outcrop is home to hovering sweetlips, emperors, cobia, estuary cod and more. The rock is covered in sponges, soft coral, feather stars, sea stars, sea squirts, shrimps, crabs and gobies. Also look out for impressive sea whips, gorgonian fans and stinging hydroids. Large turtles, circling pelagic barracuda and trevally are all common visitors, and will often follow you down to explore the sea grasses and algae on the nearby sand.