Zrinka Ljubešić is a biological oceanographer with research interest in taxonomy and ecology of marine phytoplankton. Her group specializes in taxonomy of marine diatoms, picoeukaryotes and cyanobacteria. More recently her lab focused research on detection of specific phytoplankton groups/species that could serve as bio-tracers of specific water masses and on developing and optimizing methods of its fast detection. The work is highly interdisciplinary incorporating traditional taxonomy, modern molecular biology, marine chemistry, physic and bio-optics.

Zrinka Ljubešić received a PhD in Biology at University of Zagreb, Faculty of Science, where she is employed as assistant professor since 2008.