Polycarpa annandalei   Oka  (Sea Squirt)
Organism information awaits expert curation
Class: Ascidiacea

Solitary ascidian. Quadrate in shape. Siphons raised on projections at the dorsal and ventral edges, giving the animal a cleft appearance. Apertures cross-slit. Test is thin, hard and stiff. Pearly lusture inside. Mantle is exceedingly thin and transparent with irregular network of muscles. Tentacles are finger-like of three sizes. Branchial sacs are of four narrow folds and five to nine in interspace. Dorsal tubercle is cordate in shape, ends turned inwards. Dorsal lamina is narrow, rather thick like a longitudinal bar. A small loop on the left side of the branchial sac. Stomach with longitudinal folds. Numerous elongated polycarps on the outer side of the branchial sac, 20 polycarps along the fourth fold and 14 below the anterior margin of the branchial sac. The centre of polycarp is ovarian, outer of testicular follicles.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Chennai Coast INDIA
• Tamil Nadu, Ennur INDIA

Literature Source(s)
  • Sebastian, VO and Kurian, CV (1981) Indian Ascidians Mohan Primlani, Oxford & IBH Publishing Co., New Delhi 153 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2009-06-04

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