Thordisa annulata   Eliot,  1910 (Sea Slug)
Organism information awaits expert curation
Class: Gastropoda

Size: 2.5 cm long, 1.4 cm broad.

Color: The general color of the dorsal surface is yellowish white, diversified with strongly contracting brown rings.

The general texture is soft papillae, about 1 mm high in the central area and smaller near the edges. The openings for the rhinophores and branchiae are also surrounded by small papillae. A certain number of dorsal papillae have their base enclosed by perfect or imperfect brown rings. The rest are colorless. These rings are more numerous and more regular at the sides of the visceral mass, where they form two lines on either side. They are also numerous at the anterior and posterior ends of the mantle margin. But in the mid-dorsal space they are faint and imperfectly formed. On the underside of the mantle are a few scattered deep brown spots. The branchiae are six, tripinnate and greyish. The anterior portion of the foot is contracted, but appears to be grooved and notched. The tentacles are represented by two roundish lumps.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • (1910) Records of the Indian Museum Calcutta :Pub. by order of the trustees of the Indian Museum 5 Available at -

Page last updated on:2010-12-09

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