Holothuria (Cystipus) rigida   Selenka,  1867 (Sea Cucumber)
Organism information awaits expert curation
Class: Holothuroidea

Size: 20 mm - 90 mm

Color: Yellowish white on the dorsal side and light yellow on the ventral side. Larger forms have ten pairs of light black spots on the dorsal side.

Body is dorsoventrally flattened with the two ends blunt. The body wall is rigid; dorsal side is convex and the ventral side is flat. The body is clearly demarcated into dorsal and ventral sides by the presence of flange of papillae which are triangular. In small forms (30-50 mm in length ), the dorsal side has low warts of different sizes. On the ventral side, there are three hands or pedicels. Each hand has two rows of pedicels, small and retracted. In large forms (90 mm in length), the dorsal side is smooth and free from warts. On the mid ventral region there are two rows of pedicels which are closely placed. The other two rows of pedicels are just below the lateral flange or papillae.

The radial pieces have the anterior end broader with a deep notch and small depression at the narrow posterior end. The inter-radials have an anterior knob-like projection.The spicules consist of buttons, tables and supporting plates. In large forms (90 mm in length ), the buttons are short with regular knobs on them. Each button has eight knobs at the center. In smaller forms (35 mm in length ) the buttons are long with seven knobs on each side.

Most thick-walled and less active holothurian with blackish white patches all over the body. Body wall gritty to touch. Spicules are characteristically knobbed.

Synonym (s)
Stichopus rigidus Selenka, 1867
Cystipus pleuripus Haacke, 1880
Muelleria aegyptiana Helfer, 1912
Mulleria aegyptiana Helfer, 1912

Common Name (s)
Economic Importance and Threats

Habitat:  Benthic, Reef Associated, Sandy, Coastal


• Lakshadweep, Kilttan INDIA
• Andaman and Nicobar Islands INDIA
• Red Sea
• Andaman and Nicobar Islands, Port Blair INDIA
• Andaman and Nicobar Islands, Mayabunder INDIA

Literature Source(s)
  • Mukhopadhyaya, SK (1988) On some holothurians from the Gulf of Mannar, India Records of the Zoological Survey of India 85(1) 39830 Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Mukhopadhyay, SK (1991) Echinodermata: Holothurioidea State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 399-413 Available at - NIO, Goa
  • James, DB (1995) Taxonomic studies of the species of holothuria (Linnaeus, 1767) from the seas around India. Part II Journal of the Bombay Natural History Society Bombay Natural History Society 92(1) 190-204 Available at - http://eprints.cmfri.org.in/7436/1/450-J._BOMBAY_NAT.HISTORY_SOC_1995.pdf
  • Sastry, DRK (2007) Echinodermata of India : An annotated list Records of Zoological Survey of India Occassional paper No. 271 ZSI, Kolkata 1-387 Available at - http://zsi.gov.in/checklist/Echinodermata_India_Checklist.pdf
  • James, DB (1989) Echinoderms of Lakshadweep and their zoogeography Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 97-144 Available at - http://eprints.cmfri.org.in/8213/1/Bulletin_No_43.pdf

Page last updated on:2011-04-25

Back to Search