MarLIN

information on the biology of species and the ecology of habitats found around the coasts and seas of the British Isles

Fountain anemone (Sagartiogeton laceratus)

Distribution data supplied by the Ocean Biogeographic Information System (OBIS). To interrogate UK data visit the NBN Atlas.

Summary

Description

Sagartiogeton laceratus is a small slender species up to 6 cm tall on expansion. The pillar-like column is wrinkled on contraction, smooth on expansion and flares out to the perfectly circular disc which has a diameter of up to 3 cm. The long graceful tentacles number up to 200 in total and are arranged irregularilly within 4-5 cycles. Each tentacle tapers to a fine point, are transluscent pale grey and possess 3 diffuse or white bands at the base, middle and tip (Manuel, 1988). At the base of each tentacle runs a pale v-shaped stripe, standing out from the brighter, darker orange markings of the disc. The column is a pale orange colour becoming pale buff-grey at the expanded base. The column also possess 12 cream verticle stripes, and numerous small dark spots (cinclides) in an irregular ring arrangement towards the distal end, just bellow the margin. A loose covering of mucus and sediment may also be present at the lower part of the column. There are no suckers present on this species.

Recorded distribution in Britain and Ireland

Sagartiogeton laceratus has been recorded on the western coasts of Britain and Ireland. This species may be under recorded.

Global distribution

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Habitat

Sagartiogeton laceratus is a sublittoral species recorded to 100m deep and often found in more sheltered locations. It may occur in small groups formed from one individual due to its basal laceration. This species can be found attached to shells (Turritella spp.), worm tubes or stones, and occasionally buried partially in sand or mud.

Depth range

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Identifying features

  • Slender column up to 6 cm tall.
  • Disc and Base up to 3 cm diameter.
  • Up to 200 long, slender tentacles.
  • Pale orange column with cream verticle stripes.
  • Suckers absent.

Additional information

Sagartiogeton laceratus reproduces asexually by constant pedal laceration (hence its name). A part of the base is lacerated to form a new individual, thus explaining the irregular shape of the base and irregular arrangement of tentacles and cinclides. The acontia (long stinging threads) are less readilly emitted from the cinclides than in other Sagartiid species. Sagartiogeton laceratus may be mistaken with Sagartiogeton undulatus, the former being smaller in size, brighter in colour with irregular, untidy tentacles that have no dark line running down them. Sagartiogeton laceratus can tolerate salinities up to 53.84 ppm (Stephenson, 1935).

Listed by

- none -

Further information sources

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Bibliography

  1. Gibson, R., Hextall, B. & Rogers, A., 2001. Photographic guide to the sea and seashore life of Britain and north-west Europe. Oxford: Oxford University Press.

  2. Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins.

  3. Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.

  4. Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]

  5. JNCC (Joint Nature Conservation Committee), 1999. Marine Environment Resource Mapping And Information Database (MERMAID): Marine Nature Conservation Review Survey Database. [on-line] http://www.jncc.gov.uk/mermaid

  6. Manuel, R.L., 1988. British Anthozoa. London: Academic Press.[Synopses of the British Fauna, no. 18.]

  7. National Biodiversity Network (NBN) Atlas website. Available from: http://www.nbnatlas.org.  Accessed 01 April 2017

  8. Naylor. P., 2005. Great British Marine Animals, 2nd Edition. Plymouth. Sound Diving Publications.

  9. Picton, B.E., & Costello, M.J., 2001. BioMar biotope viewer: a guide to marine habitats and fauna of Britain and Ireland. http://www.itsligo.ie/biomar/echinode/ECHSEP.HTM, 2001-06-01

  10. Stephenson, T.A., 1935. The British Sea Anemones, vol. 2. London: Ray Society.

  11. Wood. C., 2005. Seasearch guide to sea anemones and corals of Britain and Ireland. Ross-on-Wye: Marine Conservation Society.

Citation

This review can be cited as:

Rowley, S.J. 2007. Sagartiogeton laceratus Fountain anemone. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Available from: http://www.marlin.ac.uk/species/detail/2148

Last Updated: 13/08/2007