Arabella mutans   (Chamberlin,  1919) (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: Length 110-500 mm. by 2-3 mm.

Color: Flesh color or orange. Dark in spirit, sometimes with green dots.

Prostomium a pointed cone with four eyes at its base. Feet prominent though small. Dorsal cirri rudimentary. Setae include: (1) capillaries with narrow plain borders; (2) capillaries with broad borders bearing denticles proximally; (3) acicular setae with peculiar asymmetrical hoods. Acicula yellow. Jaws almost perfectly symmetrical: in var. logani, the first pair is nearly so, the second asymmetrical; in var. asymmetrica, while one of the first pairs ends in a long slender hook as usual, the other is toothed nearly its whole length.
Presetal lobe rounded and postsetal lobe longer and bluntly conical. Setae winged capillaries with smooth, or finely serrated blades. Acicular setae asymmetrically hooded.

Synonym (s)
Cenothrix mutans Chamberlin, 1919
(Objective synonym)
Arabella novecrinita Crossland, 1924
(Subjective synonym)
Aracoda obscura Willey, 1905
(Subjective synonym)

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic


• Lakshadweep, Minicoy INDIA (Record: 11/3/1983)
• Lakshadweep, Minicoy INDIA (Record: 16/02/1986)
• Lakshadweep INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Andaman and Nicobar Islands, Car Nicobar INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Misra, A and Chakraborty, RK (1991) Annelida: Polychaeta State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 137-165 Available at - NIO, Goa
  • James, PSBR ; Thomas, PA ; Pillai, CSG and Achari Kumaraswamy, GP (1969) ´╗┐Catalogue of types and of sponges, corals, polychaetes, crabs and echinoderms in the reference collections of the Central Marine Fisheries Research Institute Bulletin of Central Marine Research Institute CMFRI, Cochin 7 1-66 Available at -
  • Sealifebase Available at -
  • Fauvel, P (1953) The fauna of India including Pakistan, Ceylon, Burma and Malaya: Annelida, Polychaeta The Indian press ltd., Allahabad 507 pp Available at - NIO, Goa

Page last updated on:2011-03-21

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