Amphianthus dohrnii
| Amphianthus dohrnii | |
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| Species: | A. dohrnii
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| Binomial name | |
| Amphianthus dohrnii (Koch, 1878)[1]
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Gephyra dohrnii Koch, 1878 | |
Amphianthus dohrnii, the sea fan anemone, is a species of sea anemone in the family Hormathiidae. It occurs in the northeastern Atlantic Ocean and Mediterranean Sea and grows on sea fans.
Distribution and habitat
Amphianthus dohrnii is native to the northeastern Atlantic Ocean and the western end of the Mediterranean Sea. It is scarce on the west coast of Scotland but more plentiful in southwestern Britain and in the western and southern parts of Ireland. It is present on the west coast of France and the westernmost parts of the Mediterranean at depths down to about 1,000 m (3,281 ft). It tolerates both strong and weak currents and both plenty of, and little, wave action.[2] It seems to grow exclusively on the stems of gorgonian corals, primarily the northern sea fan (Swiftia pallida) in the north of its range, and the pink sea fan (Eunicella verrucosa) in the south.[3]
Description
Amphianthus dohrnii is a small species, seldom exceeding 1 cm (0.4 in) in diameter, though the base, where it adheres to the substrate, may be up to 25 mm (1.0 in) long. It has about eighty short, tapering tentacles and is red, orange, pinkish or buff, with irregular translucent white markings.[4][5]
Biology
Reproduction is mostly by basal laceration, a form of asexual reproduction. The sea anemone crawls along a hard surface and pieces of tissue become detached and grow into new individuals. However, it is likely that sexual reproduction sometimes takes place, as otherwise this species would be unlikely to be so widely dispersed.[5] Amphianthus dohrnii was at one time common in both the Mediterranean and the English Channel, but it seems now to be absent from the former and increasingly rare in the latter.[6] In British waters, the sea fan Eunicella verrucosa has declined, possibly being damaged by dredging or in association with higher sea temperatures, and the already rare Amphianthus dohrnii has become scarcer.[7]
References
- ^ a b Fautin, Daphne (2014). "Amphianthus dohrnii (Koch, 1878)". WoRMS. World Register of Marine Species. Retrieved 2014-12-13.
- ^ Jackson, Angus (2009). "Sea fan anemone - Amphianthus dohrnii - Habitat preferences and distribution". MarLIN. Retrieved 2014-12-13.
- ^ Wilding, Catherine; Wilson, Emily (2009). "Northern sea fan - Swiftia pallida - General biology". MarLIN. Retrieved 2014-12-13.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ^ Jackson, Angus (2009). "Sea fan anemone - Amphianthus dohrnii - General biology". MarLIN. Retrieved 2014-12-13.
- ^ a b "Sea-fan anemone Amphianthus dohrnii". ARKive. Retrieved 2014-12-13.
- ^ Sue Wells; IUCN Conservation Monitoring Centre; International Union for Conservation of Nature and Natural Resources; International Union for Conservation of Nature and Natural Resources. Species Survival Commission (1983). The IUCN invertebrate red data book. IUCN. p. 23.
- ^ Hiscock, Keith; Southward, Alan; Tittley, Ian; Hawkins, Stephen (2004). "Effects of changing temperature on benthic marine life in Britain and Ireland". Aquatic Conservation. 14 (4): 333–362. doi:10.1002/aqc.628.
{{cite journal}}: CS1 maint: multiple names: authors list (link)