Sydney Aquarium has recently welcomed four spectacular juvenile weedy seadragons to its family of marine animals.
The weedy seadragons, who are all siblings, were bred at the Melbourne Aquarium, one of only a few in the world that has been successful in breeding the creatures in captivity.
Three are 20 centimetres long and the other 12 centimetres.
Closely related to seahorses, weedy seadragons are distinct in behaviour as well as in their magnificently colourful and "weedy" appearance.
They are one of only a few aquatic species of which the males carry the eggs.
Once the female produces the eggs, she transfers them to the male who cares for them in the skin under his tail for a month before the hatchlings emerge.
Weedy seadragons are unique to Australia and are found in Sydney Harbour, with a colony located near the airport at Botany Bay.
However, due to damage of habitat from development and pollution, these beautiful, elusive creatures remain threatened.