The float measures 2-15 cm. The main or fishing tentacle may be up to 10m long and is responsible for most of the stings. The larger Atlantic specimens probably represent more of a threat to human life. The venom contains lethal and haemolytic components and has been shown to produce nerve conduction disturbances, flaccid paralysis and smooth muscle contraction in experimental animals. Systemic symptoms are uncommon but may include headache, nausea and vomiting, abdominal pain and occasionally collapse.
First aid consists of removal of the tentacles, preferably with forceps.
Vinegar is not recommended. Widely distributed throughout the world, in both tropical and temperate waters, this multicoloured jellyfish usually measures approximately 12cm across the bell. Contact with the tentacles or bell causes local pain. No deaths or serious illnesses have been recorded. Hairy jellyfish are widely distributed, and found in coastal waters throughout Australia.