Sebae anemone
species of cnidarian
The sebae anemone (Radianthus crispa), also known as leathery sea anemone, long tentacle anemone, or purple tip anemone, is a species of sea anemone in the family Stichodactylidae and native to the Indo-Pacific.
It was first described in 1834 by Wilhelm Hemprich and Christian Gottfried Ehrenberg as Actinia crispa.
Description
The sebae anemone is characterized by a flared oral disc that reaches between 20 and 50 cm in diameter and with multiple and long tentacles measuring 10 to 15 cm. These tentacles have rounded tip and the end is often colored with a purple or blue spot. The column, external structure of an anemone visible when the animal is closed, is gray in color and dotted with sticky whitish "warts". The sea anemone, being member of the Hexacorallia, usually carries a number of tentacles multiple of six and they are positioned in concentric circles. These are light beige to purple.
Distribution and habitat
The sebae anemone is widespread throughout the tropical and subtropical waters of the Indo-Pacific area from the eastern coasts of Africa, Red Sea included, to Polynesia and from south Japan to Australia and New-Caledonia.
This sea anemone prefers hard base substrates slightly covered with sand but it can also cling to branching corals from the surface to 40 meters deep.
Biology
The sebae anemone has two ways to feed.
This brief starts where responsible research should: with the source description of “Sebae anemone” as species of cnidarian. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the science & nature register because the source frames it as species of cnidarian. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q1811545. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1834.
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This entry incorporates text from “Sebae anemone” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.