Signs urging Magnetic Island residents to report any sightings of Death Adders are on display , part of a study backed by National Geographic . Another public notice on the island drew attention to a Sea Shepherd movie, Shark Cull , based on the controversial cull that took place in Western Australia in 2014 , still relevant to Queensland waters , said to be a must see show for anyone interested in protecting sharks and marine conservation . It was introduced by Sea Shepherd volunteer and Whitsunday dive operator, Tony Fontes . Seen swimming about in the Magnetic Island safe harbour of late are Sea Mullet skimming along the surface , one below .