Actinothoe sphyrodeta

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Actinothoe sphyrodeta
In Santander (Spain)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Cnidaria
Class: Hexacorallia
Order: Actiniaria
Family: Sagartiidae
Genus: Actinothoe
Species:
A. sphyrodeta
Binomial name
Actinothoe sphyrodeta
(Gosse, 1858)[1]
Synonyms[1]
List
  • Actinia candida Gosse, 1853
  • Sagartia candida
  • Sagartia sphyrodeta Gosse, 1858
  • Sagartia sphyrodita
  • Thoe sphyrodeta (Gosse, 1858)

Actinothoe sphyrodeta, the sandalled anemone,[2] is a small sea anemone in the family Sagartiidae. It is native to the northeastern Atlantic Ocean and is common on the north, west and south coasts of Britain. It is usually grey or whitish but may have an orange oral disc. The translucent white tentacles that grow around the edge of the oral disc can number up to 120.

Description

Actinothoe sphyrodeta is a small, delicate sea anemone. The base can grow to a diameter of about 1 cm (0.4 in) and the anemone often appears plump and squat, but the column can be extended to a length of 3 cm (1.2 in), and the oral disc expanded to a diameter of 2 cm (0.8 in). The column is smooth, and has a number of

cinclides, which appear as dark slits on the upper part of the column, but no adhesive suckers. Five whorls of up to 120 irregularly arranged, moderately long tentacles grow at the edge of the oral disc. Acontia (stinging threads) from the gastrovascular cavity can readily be extruded from the mouth which is at the centre of the oral disc. The column is pale grey, the oral disc is white or orange and the tentacles are white with grey bases.[3][4][5] This sea anemone can be distinguished from similarly coloured forms of Sagartia elegans by the presence of longitudinal white striations on the column and the absence of suckers.[4]

Distribution and habitat

Actinothoe sphyrodeta is common around the

sublittoral species, inhabiting depths down to about 50 m (164 ft).[4]

Ecology

Actinothoe sphyrodeta reproduces by longitudinal fission.[6]: 133  The base lengthens in one plane, the two halves of the base move apart and the tissue between them tears; often base and oral disc rupture first. The two resulting fragments may be of unequal size but both normally have part of the base, throat, oral disc and ring of tentacles. The wounds heal and two new individuals are formed.[6] This sea anemone is often found living in association with the jewel anemone (Corynactis viridis), and the Devonshire cup coral (Caryophyllia smithii).[5]

References

  1. ^ a b Fautin, Daphne (2018). "Actinothoe sphyrodeta (Gosse, 1858)". WoRMS. World Register of Marine Species. Retrieved 11 September 2018.
  2. ^ a b "Actinothoe sphyrodeta (Gosse, 1858): Sandalled anemone". NBN Atlas. Retrieved 21 December 2016.
  3. ISBN 978-0-521-04862-0
    .
  4. ^
    ISBN 978-0-19-954944-3
    .
  5. ^ a b "Sandalled anemone (Actinothoe sphyrodeta)". MarLIN (The Marine Life Information Network). Retrieved 11 September 2018.
  6. ^
    doi:10.1017/S0025315400029751
    .

External links

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