Dwarf bobtail (Sepiola rondeletii)

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



Sepioloa rondeletii is a small cephalopod of up to 6 cm in length. Most similar to Sepiola atlantica but the ventral mantle edge is undulate.

Recorded distribution in Britain and Ireland

Found mainly off the south coasts of Britain

Global distribution

Throughout the Mediterranean; in the Eastern Atlantic, it extends from the North Sea to Senegal.


Found offshore on sandy and muddy substrata.

Depth range


Identifying features

  • Tentacular clubs well developed, 8 suckers in the transverse rows.
  • Gladius rudimentary.
  • Ventral margin of mantle with a dense border of chromatophores.
  • Outer surface of tentacular clubs heavily pigmented with chromatophores.

Additional information

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Listed by

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

  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. Miramand, P. & Bentley, D., 1992. Concentration and distribution of heavy metals in tissues of two cephalopods, Eledone cirrhosa and Sepia officinalis, from the French coast of the English Channel. Marine Biology, 114, 407-414.

  4. Roper, C.F.E., Sweeney, M.J. & Nauen, C.E., 1984. FAO species catalogue. Vol. 3. Cephalopods of the world. An annotated and illustrated catalogue of species of interest to fisheries. FAO Fisheries Synopsis, 125, 3, 277. Avaliable: http://www.fao.org/docrep/009/ac479e/ac479e00.htm


  1. NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org.

  2. OBIS (Ocean Biodiversity Information System),  2024. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2024-04-21


This review can be cited as:

Wilson, E. 2006. Sepiola rondeletii Dwarf bobtail. In Tyler-Walters H. and Hiscock K. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 21-04-2024]. Available from: https://www.marlin.ac.uk/species/detail/1104

Last Updated: 06/11/2006