MarLIN

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

A sponge (Suberites carnosus)

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

Summary

Description

The growth form of Suberites carnosus is variable. Although typically spheroid and anchored to the substratum by a short stalk, rather like a fig, it may also be encrusting or massive (growth vertical and lateral but unequal) and lobed, up to 15 cm in height. It is yellow to brown in colour. In the fig-shaped form, there is usually a single, apical osculum (a large surface pore, through which water leaves the body cavity), in massive lobed forms there may be several oscules but usually all on the uppermost surface. Surface is smooth and even. Contraction of the sponge is substantial when disturbed, with a corresponding change in consistency from soft to firm.

Recorded distribution in Britain and Ireland

Widespread along Atlantic facing coasts of Britain and Ireland.

Global distribution

Common in the NE Atlantic and Arctic. Distribution extends south to the Mediterranean.

Habitat

Usually in clean water where currents are not strong on circalittoral rock (often vertical surfaces).

Depth range

-

Identifying features

  • Growth form cushion, massive-lobed or massive fig-shaped and stalked, up to 15 cm in height.
  • Yellow, buff or orange in colour.
  • Single apical surface osculum, or several in massive-lobed form
  • Surface even and smooth to touch.
  • Smells faintly of freshly cut Laminaria stipe.
  • Dramatic contraction to about ¼ of its fully expanded size when disturbed.
  • Skeleton consists of siliceous spicules, megascleres (325-500 µm) requiring microscopic examination for identification. Microscleres are absent.
  • The spicules of Suberites carnosus are classified as tylostyles (pin-like with a pinched bulbous end).

Additional information

Skeleton
For examination, magnifications of x 100 to x 1000 are required. The skeleton consists of spicules, tylostyles, of two distinct sizes. The largest constitute the main structural megascleres, whereas the smaller are perpendicularly arranged plumose brushes at the surface. The structure is subradiate, the radial arrangement of the spicules being most apparent near the surface. Internally the skeleton is confused and almost 'halichondriod' (like that of the Family Halichondrida, where the spicules of the endosomal skeleton are in disarray). In the stalk region the spicules are condensed to form an axial skeleton (Moss & Ackers, 1982).
Other species
Suberites ficus is another common sponge. It is usually found on hard substrata where there are tidal currents and also on wreckage where it hangs down into the current. It has a similar growths form to Suberites carnosus but may also be cylindrical. Colours include white, grey marbled and green in addition to orange. Surface and endosomal skeleton differ. Differences between Suberites carnosus and Suberites ficus (as S. domuncula) are based on criteria communicated by S.M. Stone in Moss & Ackers (1982).

Listed by

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Further information sources

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Bibliography

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

  2. 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.]

  3. Moss, D., & Ackers, G. (eds.), 1982. The UCS Sponge Guide. Produced by R. Earll. Ross-on-Wye: The Underwater Conservation Society.

  4. Van Soest, R.W.M., Picton, B. & Morrow, C., 2000. Sponges of the North East Atlantic. [CD-ROM] Windows version 1.0. Amsterdam: Biodiversity Center of ETI, Multimedia Interactive Software. [World Biodiversity Database CD-ROM Series.]

Citation

This review can be cited as:

Budd, G.C. 2002. Suberites carnosus A sponge. 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/1746

Last Updated: 12/07/2002