400 species of sharks found worldwide today, 170 of them inhabit Australian seas, from the largest (whale shark) to the smallest (pygmy shark)

Sharks occur in depths up to 3000m. Great whites dive deeper than 1km and are seasonal visitors to temperate coastal waters, lured by the likelihood of a feed at seal and sea-lion rookeries and haul-out areas. Though it may seem like shark attacks are more common than in the past, the chances of an encounter are still quite rare.

Australian waters contain a variety of jellyfish species, some are particularly venomous - including the box and Irukandji.

Box jellyfish and Irukandji are found in the tropical waters of northern Australia, with their stinger season typically running from November to May. Stay Jellyfish Safe

The largest living reptiles and dominant predator in Northern Australia -males reach lengths of up to 6m and can weigh over 1,000kg. 

A mostly aquatic species known for their aggressive nature and can be found in a variety of brackish, saltwater, and freshwater habitats. Any body of water in the Top End may contain large and potentially dangerous crocodiles. Only swim where there are designated safe swimming signs.

Australian sea lions are a type of pinniped (seals, sea lions and walruses) that are only found on our shores. 

Sea lions are unique to South Australia and Western Australia. Their total population is less than 12 000, with 85 percent in South Australia and the other 15 percent in Western Australia. 

6 of the 7 species of marine turtles in the world can be found in Australia: Flatback, Green, Leatherback, Loggerhead and Olive Ridley.

Sea turtles in Australia inhabit a wide range of coastal and marine environments, from the Great Barrier Reef to the western and northern coasts

Dugongs, or "sea cows," are found in the warm coastal waters of northern Australia. They are herbivores that graze on seagrass beds.

Found in the warm coastal waters of northern Australia, particularly in the Great Barrier Reef, Shark Bay, and Ningaloo Reef regions.

3 main species -leafy, weedy, and ruby. You can find the Weedy Seadragons in Victoria's Mornington Peninsula.

Found in temperate waters, particularly along the southern coast of Australia.