Styela areolata   Heller  (Sea Squirt)
Organism information awaits expert curation
Class: Ascidiacea


Solitary ascidian. Oval or pyriform in shape. Size, 2 cm * 1.5 cm. Surface is soft and uneven. Both siphons are on the dorsal edge with cross slits. Test is thin and transparent. Mantle is semi-transparent with very fine muscle bundles. Four folds of branchial sacs on each side. Five inner longitudinal bars on a fold and three in interspace. Meshes elongated transversely with eight to nine stigmata. Tentacles are simple in two sizes. Dorsal tubercle is horse-shoe shaped with ends turned in or out. Stomach is with longitudinal ridges, intestine forms a close loop. Three to seven tubular gonads on the right side, one to three on the left.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Ennur INDIA

Literature Source(s)
  • Nagabhushanam, AK and Krishnan, S (1993) Observations on the distribution of some of the marine organism inhabiting the inter-tidal zone along the western continental shelf of the Bay of Bengal, with particular reference to the Tamil Nadu coastal strip Records of the Zoological Survey of India 93(3-4) 449-490 Available at - ZSI, Pune
  • Sebastian, VO and Kurian, CV (1981) Indian Ascidians Mohan Primlani, Oxford & IBH Publishing Co., New Delhi 153 pp Available at - NIO, Goa

Page last updated on:13-04-09

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