
Source: Wikimedia Commons
Radianthus crispa
The oral disc flares to 20-50 cm and carries many long tentacles of 10-15 cm with rounded tips, often marked with a purple or blue spot. The grey column is dotted with sticky whitish warts.
Radianthus crispa was described in 1834 by Hemprich and Ehrenberg as Actinia crispa. It is widespread across the tropical and subtropical Indo-Pacific, from the east coast of Africa including the Red Sea to Polynesia and from southern Japan to Australia and New Caledonia. It prefers hard substrate lightly covered with sand but will also cling to branching corals, from the surface down to 40 m. The flared oral disc reaches 20-50 cm and carries many tentacles 10-15 cm long, arranged in concentric circles in multiples of six, with rounded tips often marked by a purple or blue spot. The grey column is dotted with sticky whitish warts. It feeds both by photosynthesis and by capturing prey. Hosting 15 species of anemonefish it is highly generalist, and in the Red Sea it is regarded as a nursery anemone, since sexually mature fish are rarely found in it.
Source: Wikipedia (CC BY-SA 4.0)
The Sebae Anemone grows to Oral disc 20-50 cm, tentacles 10-15 cm.
The ideal temperature for the Sebae Anemone is 22〜26℃.
Origin
Tropical and subtropical Indo-Pacific, from the east coast of Africa including the Red Sea to Polynesia, and from southern Japan to Australia and New Caledonia
Size
Oral disc 20-50 cm, tentacles 10-15 cm
Temperature
22〜26℃
Sources: LiveAquaria (Sebae Anemone) / SeaLifeBase
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Radianthus crispa (Hemprich & Ehrenberg in Ehrenberg, 1834)
Synonyms: Heteractis crispa (Hemprich & Ehrenberg in Ehrenberg, 1834), Actinia crispa Hemprich & Ehrenberg in Ehrenberg, 1834, Antheopsis crispa (Ehrenberg, 1834)
Authority databases: WoRMS
Nomenclature follows global taxonomic authority databases.
Sources: CITES Appendices (species not listed)
Regulations may change. Always verify the latest information with the relevant authorities.
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Nutrition from symbiotic zooxanthellae, supplemented about once a week with meaty foods such as fish, shrimp and clam.
Care tables for this family list lighting as high. It depends on its zooxanthellae and needs strong illumination; bleached specimens have lost their symbionts and are difficult to recover.
Flow should be moderate. It prefers hard substrate lightly covered with sand, and in the aquarium it usually wedges its foot where the rockwork meets the sand bed.
Water 22-26C, specific gravity 1.020-1.025. It is difficult to acclimate and needs a mature tank with stable water chemistry.
Besides photosynthesis, offer meaty foods such as fish, worms, clam and shrimp about once a week. A healthy specimen is very sticky to the touch.
The name Sebae Anemone is also applied to Radianthus malu, so check the scientific name when buying. It is not listed in the CITES Appendices.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Sebae Anemone is 22〜26℃. Avoid sudden temperature changes and maintain a stable environment.
Sebae Anemone typically reaches Oral disc 20-50 cm, tentacles 10-15 cm as an adult. Size may vary depending on care conditions and individual genetics.
Sebae Anemone feeds on: Nutrition from symbiotic zooxanthellae, supplemented about once a week with meaty foods such as fish, shrimp and clam.. Aim for a balanced diet with appropriate feeding frequency.
The price of Sebae Anemone varies significantly depending on variety, size, and individual quality. Check our market price page for the latest pricing information.
Last updated: September 16, 2026