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| | DFO|Pacific Region|Science|Ocean Sciences|Research|Zooplankton|Urochordata |
 | | Description: world wide, northern range to the Bering Sea, primarily oceanic, diel migrator, at surface at night. |
 | | Doliolida feed mainly on phyto and nanoplankton, complex lifecylce of alternating sexual/asexual generations |
 | | Description: oceanic off California, can produce high levels of ammonia as by product, up to 15mm. |
| www.pac.dfo-mpo.gc.ca /sci/osap/projects/plankton/zooplankton/urochordata_e.htm (107 words) |
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