Stinging jellyfish are a type of marine creature that can cause painful stings. The two most common types of stinging jellyfish are the Irukandji and the Sea Nettle. Irukandji is a small species of jellyfish found in the waters of Australia and the Indo-Pacific region, while Sea Nettle is a larger species of jellyfish found in the Atlantic and Pacific oceans. Both species have long tentacles covered in venomous cells that can cause a painful sting when touched.