A beach walk along Dee Why Beach quickly turned unforgettable when a local spotted a rarely seen creature known as a blue dragon washed up on the sand. The striking sea slug, famous for its bright blue colour and unusual shape, is not only beautiful but can deliver a nasty sting if touched.
Sightings Spark Local Fascination
On Thursday, April 24, Ali Cavill, owner of Fit Fantastic, encountered a vibrant blue dragon (Glaucus atlanticus) lying motionless on the sand at Dee Why Beach. The sighting captivated locals, and quickly shared the photo online, while marine experts urged the public to admire the creature from a safe distance.
Though only about three centimetres long, the blue dragon feeds on bluebottle jellyfish and stores their venom, allowing it to deliver a painful sting if touched.
What Makes Blue Dragons Special?
Blue dragons float upside down on the ocean’s surface, using their vibrant blue topside to blend with the water and their silver-grey underside to hide from predators. They feed on venomous prey like bluebottle jellyfish, storing the captured venom for their own defence.
Although rare, experts said blue dragons can wash ashore after storms or strong onshore winds, with sightings reported last year at Lake Macquarie and Coolangatta Beach.
Experts Urge Caution
Despite their small size and delicate appearance, blue dragons can cause serious discomfort. Marine specialists advise rinsing stings with seawater, immersing the area in hot water for 20 minutes, and seeking medical help if needed.
Authorities have urged residents and visitors to admire the creatures from a distance, with awareness campaigns reminding families to prioritise safety at the beach.
Nature’s Surprises on Sydney Beaches
Dee Why Beach often sees natural wonders, but the blue dragon’s arrival gave locals a rare glimpse of the marine life beyond the waves.
The sighting sparked excitement across the northern beaches, and with summer approaching, experts encourage beachgoers to watch for more unusual visitors while respecting the local environment.
Published 29-April-2025
