Jimble (Carybdea rastoni)

Common Name



Carybdea rastoni

Size and Appearance

Transparent bell 1.5-3cm in diameter. Four tentacles, one in each corner, 5-15cm long.


Size relative to human


Australia-wide. Most common in South Australia, Western Australia and southern New South Wales.


Distribution in Australian waters

First Aid
  1. Remove casualty from water if safe to do so
  3. Remove any adhering tentacles
  4. Wash area with sea water (not freshwater)
  5. Place casualty’s stung area in hot water (as hot as the victim can stand) for 20 minutes
  6. If local pain is unrelieved by heat or if hot water is not available, apply a cold pack or ice in a bag
  7. If pain persists or is generalised, or if the sting area is large or involves sensitive areas (e.g. the eyes), dial triple zero (000) and seek assistance from lifeguards if available


Carybdea sting

Did You Know?
  • Carybdea sp. often swarm in dense congregations in the waters off Sydney, Adelaide and Perth and may form large schools at the surface or swim over a sandy bottom
  • High risk months are during spring and summer