Flame jellyfish (Rhopilema esculentum)

Overview

The flame jellyfish (Rhopilema esculentum) is a large, robust species notable for its striking appearance, often featuring a whitish or bluish bell with reddish-brown oral arms that resemble flames. Valued as a food source in East Asian cuisine, it is sometimes called the “edible jellyfish.” It inhabits the coastal waters of the Northwest Pacific Ocean. While its sting is not considered severely dangerous to humans, it can cause slight irritation. This species often forms large aggregations and plays a significant role in both local fisheries and marine ecology.
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Species Information

  • Harmful to humans: No

  • Distribution: Coastal waters of the Pacific Ocean from China to South of Japan

  • Maximum bell size: 60cm (24 inches)

  • Life span: 1-2 years

  • Feeding: Freshly hatched baby brine shrimp, coral reef food

  • Temperature: 20-26°C (68-79°F)

  • Salinity: 25-30ppt

  • Photosynthetic: No

  • Care level: Easy

Notes: They perform best and are most stable in slightly less salty water, around 26 ppt. To grow flame jellies to a large size, feed them baby brine shrimp as often as possible throughout the day. It is crucial to keep the tank clean and free of debris, as they may ingest it, leading to internal rot and fatal damage.
The polyps can be kept at standard room temperature. To trigger strobilation (the process of producing young jellies), gradually lower the temperature to 13-16°C. Be aware that the polyp colony will often diminish or disappear after this process is complete. Freshly hatched brine shrimps are suitable for culturing both polyps and ephyrae.