Can jellyfish and watermelon be eaten together?
Generally speaking, jellyfish and watermelon can be consumed together, but it is not recommended to eat them in large quantities. The detailed analysis is as follows:

Jellyfish is rich in iodine, mannose polysaccharide gel, and various minerals. It is low in calories and has effects of clearing heat, resolving phlegm, lowering blood pressure, and reducing swelling. Watermelon contains abundant vitamin C, lycopene, and large amounts of water; it can stimulate saliva production to relieve thirst, clear internal heat, and alleviate summer heat. When consumed together, their nutrients complement each other, meeting the body's needs for various nutrients and jointly exerting a heat-clearing and fire-reducing effect. This combination is especially suitable for consumption during hot weather, helping the body quickly replenish water and energy and relieving discomfort caused by excessive internal heat.
However, there are also some considerations when consuming them together. Jellyfish is usually pickled and thus high in sodium, while watermelon contains a considerable amount of sugar. Therefore, individuals with hypertension, diabetes, and those with weak gastrointestinal function should limit their intake to avoid placing excessive burden on the body. Additionally, ensure the jellyfish is thoroughly cleaned and the watermelon is fresh and unspoiled before consumption to prevent gastrointestinal discomfort.