Radianthus doreensis

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Radianthus doreensis
Anemona (Macrodactyla doreensis), Anilao, Filipinas, 2023-08-24, DD 178.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Cnidaria
Class: Hexacorallia
Order: Actiniaria
Family: Stichodactylidae
Genus: Radianthus
Species:
R. doreensis
Binomial name
Radianthus doreensis
(Quoy & Gaimard, 1833)
Synonyms
List
  • Actinia doreensisQuoy & Gaimard, 1833
  • Antheopsis doreensis(Quoy & Gaimard, 1833)
  • Anthopleura gelam(Haddon & Shackleton, 1893)
  • Cereactis doreyensis(Quoy & Gaimard, 1833)
  • Condylactis doreensis(Quoy & Gaimard, 1833)
  • Condylactis gelamHaddon & Shackleton, 1893
  • Heteractis doreensis(Quoy & Gaimard, 1833)
  • Macrodactyla doorensis
  • Macrodactyla doreenensis
  • Macrodactyla doreensis (Quoy & Gaimard, 1833)
  • Macrodactyla gelam(Mariscal 1972)
  • Paractis doreyensis

Radianthus doreensis, also known as long tentacle anemone and corkscrew tentacle sea anemone, [1] is a species of sea anemone in the family Stichodactylidae.

Contents

Description

Radianthus doreensis has relatively few tentacles. They are all similar to one another in size and colour, being purplish-gray to brown. Each grows to about 1.75 inches, are sinuous, and each taper evenly toward the tip. In some cases they have a corkscrew shape.

The oral disc is normally purplish-gray to brown, and sometimes has a green cast. It has a flared shape, and grows to a maximum of 5 cm wide, but is often far smaller. It has white lines that are oriented radially, sometimes extending onto the tentacles.

This species remains at the surface of the sediment, with the column buried. The lower portion of the column is a dull orange to bright red colour, with the upper portion being brownish, containing a round to ovoid verrucae in rows oriented longitudinally.

Distribution and habitat

This species is found in Japan, and south to the waters of New Guinea and northern Australia. [1] This species is commonly found at depths of 5 metres or less in muddy bottoms, and is commonly seen without fish present.

Behaviour

The tentacles of Radianthus doreensis may either shrivel, or stick to the hand of a person who disturbs it. This anemone can retract entirely into the sediment. [1]

Symbionts

Amphiprion clarkii on Radianthus doreensis Amphiprion 2.jpg
Amphiprion clarkii on Radianthus doreensis

R. doreensis is a host of 5 different species of fish. [1] [n 1]

Notes

  1. R. doreensis was recorded [1] as a host of Amphiprion chrysogaster , the Mauritian anemonefish, however this was an error. [2]

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References

  1. 1 2 3 4 5 Fautin, Daphne G.; Allen, Gerald R. (1997). Field Guide to Anemone Fishes and Their Host Sea Anemones. Western Australian Museum. ISBN   9780730983651. Archived from the original on 14 April 2015.
  2. 1 2 Ollerton, Jeff; McCollin, Duncan; Fautin, Daphne G.; Allen, Gerald R. (2007). "Finding NEMO: nestedness engendered by mutualistic organization in anemonefish and their hosts". Proceedings of the Royal Society of London B: Biological Sciences. 274 (1609): 591–598. doi:10.1098/rspb.2006.3758. PMC   1766375 . PMID   17476781.