This high-resolution image shows jellyfish with distinctive long tentacles, which are responsible for delivering painful stings through microscopic venomous cells called nematocysts. Accurate diagnosis of jellyfish stings often involves evaluating the appearance of the sting site, reviewing the patient’s symptoms, and—when possible—identifying the jellyfish species involved. Some stings may cause mild skin irritation, while others can lead to systemic reactions. This image reinforces the importance of recognising jellyfish types for effective diagnosis and prompt, species-specific treatment, especially in regions where dangerous jellyfish are common.