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 CommunicationOccurrence of high levels of tetracosahexaenoic acid in the jellyfish Aurelia sp. Peter D. Nichols1  , Kathryn T. Danaher2 and J. Anthony Koslow3 | (1) | Commonwealth Scientific & Industrial Research Organization (CSIRO) Marine Research, GPO Box 1538, 7000 Hobart, Tasmania, Australia |
| (2) | School of Marine Biology and Aquaculture, James Cook University, 4811 Townsville, Queensland, Australia |
| (3) | CSIRO Marine Research, Floreat, Western Australia, Australia |
Received: 16 July 2003 Revised: 14 October 2003 Accepted: 15 October 2003 Abstract The FA composition of the pelagic jellyfish Aurelia sp. collected from off-shore Western Australia waters was determined by capillary GC and GC-MS, with confirmation of PUFA structure performed by analysis of 4,4-dimethyloxazoline derivatives. PUFA constituted 47.6% of the total FA, with the essential PUFA eicosapentaenoic acid (FPA), arachidonic acid, and DHA accounting for 34%. Of particular interest, the unusual very long chain PUFA 6,9,12,15,18,21-tetracosahexaenoic acid (THA, 24∶6n−3) was present at 9.3%, and the rarely reported 6,9,12,15,18-tetracosapentaenoic acid (24∶5n−6) also was detected at 0.8%. To our knowledge, this represents the first report of THA as a major PUFA in a pelagic marine organism.
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