Some of the most dangerous jellyfish of the Indo-Australian region (ecology, morphology and clinical features):

a Chironex fleckeri lives primarily in flat coastal regions. Stings leave typical marks with a ladder-like "cross-hatching" pattern.

b Physalia sp. sail on the surface of the water and are drifted into waters near the coast. The tentacle marks are whip-like.

c Carukia barnesi is a thumb-sized jellyfish that lives in open water. They may enter reefs after strong storms. Stings are caused by the bell and are barely visible. Accidents with these jellyfish often occur in divers, and only very small areas of the skin that are not protected (throat, face) are affected.