Frédéric Silvestre had the chance to give a seminar for the LIBST research institute of Louvain-la-Neuve (Louvain Institute of Biomolecular Science and Technology). It was attended by researchers of the Institute and by many master students. Thanks to Cathy Debier for the invitation and for the opportunity to share some of our recent researches on the mangrove rivulus. The totle of the seminar was “Adaptation and Evolution without genetic diversity: epigenetic mechanisms in the self-fertilizing vertebrate mangrove rivulus”.