Echinoderms · Marine Life · Sea cucumbers

Horseshoe sea cucumber (Roweia frauenfeldii)

Dug out horseshoe sea cucumber, with its U-shape, dark body, covered with shell bits and sediments. Doringbaai, Western Cape (2020) – iNaturalist

Two subspecies are present in South Africa : Roweia frauenfeldii subsp. frauenfeldii on the West and South coasts, and R. frauenfeldii subsp. webbi on the East Coast.

Body arched into a typical U-shape, dark above and grey below. Tubefeet are grouped into five bands, each made up of 4 to 6 rows (2 to 3 rows towards the ends of the body). Ten irregularly-branched tentacles.

Typically 70 to 80 mm.

A crevice-dwelling species. Cape specimens are usually found under sand with only the tentacles and the anus projecting, the remainder of the body being firmly attached to a rock buried beneath the sediment surface.

Two Oceans: A Guide to the Marine Life of Southern Africa (2007)
Details of the ten irregularly-branched tentacles, peaking out of the gravels. Doringbaai, Western Cape (2020) – iNaturalist

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