Mangrove Ark at Cockle Bay, Magnetic Island, Queensland, Australia.
Approximately 300 meters offshore in Cockle Bay is the site of the wreck of SS City of Adelaide, a fire-damaged former passenger steamer and coal storage hulk which was wrecked in the bay in 1915 while under tow from Townsville to Picnic Bay for scuttling as a breakwater. On 24 December 1971, Cyclone Althea struck the area, causing the partial collapse of part of the wreck′s iron hull, but the wreck has become an artificial island hosting a variety of plant and bird life.