Marine Biology

, Volume 36, Issue 2, pp 191–197 | Cite as

A new type of excretory mechanism in the tunicates

  • A. C. Heron


A new type of excretory system has been found in the salp Thalia democratica Forskal. Crystalline excretory products are expelled physically from the body, by previously undescribed organs. These organs are different in the two morphs which comprise the alternating generations of this pelagic tunicate. The removal of the crystalline products, which are tolerated for life in the bodies of sessile tunicates, probably prevents these transparent pelagic animals becoming visible to their predators.


Uric Acid Enzyme Deficiency Crystalline Particle Sexual Stage Excretory System 
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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • A. C. Heron
    • 1
  1. 1.CSIRO Division of Fisheries and OceanographyCronullaAustralia

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