Soestia zonaria


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Aggregate generation: to 60 mm; solitary generation: to 50 mm
Filter feeders; phytoplankton and other small particles.
Medusae, siphonophores, ctenophores, heteropods, sea turtles, marine birds and many fish.
Useful Facts or Characters: 

The aggregate generation zooid possesses a thick, rigid tunic.  All body muscle bands are very clear and wide with body muscle band 1 dorsally interrupted and body muscle band 5 split on the left side when in dorsal view.   The solitary generation zooid is prismatic in shape with pointed posterior projections and possesses a thick test with even thicker clearly visible body muscle bands compared to the aggregate generation. 


Bone, Q. (1998) The biology of pelagic tunicates. Oxford University Press, Oxford.

Wrobel, D. and Mills, C. (1998) Pacific Coast pelagic invertebrates:  a guide to the common gelatinous animals. Sea Challengers, Monterey Bay Aquarium, Monterey, CA.

Yount, J.L. (1954) The taxonomy of the Salpidae (Tunicata) of the central Pacific Ocean. Pacific Science 8: 276-330.