Located off Cairns on the Great Barrier Reef, the Great Detached Reef is a large complex of several reefs on an older fossil surface. This reef has about 46km of edge. Wall diving and very steep down to over 400 metres with some small caves in the wall. Barracuda, trevally and sharks, along with schools of basslets, fussiliers and sometimes blue-lined snapper. Moray eels, lobster, shrimp and nudibranch. Lots of large potato cod and some mantarays and turtles.