After a long waiting time due to the Covid crisis (postponed since summer 2020), our PhD student Ivan Blanco has finally arrived in Maryland to work with Professor Eric S. Haag during 2 months. He aims to use microinjection techniques to knock-down some genes in the early embryo of the mangrove rivulus. He will gain expertise of using the cutting-edge CRISPR-Cas9 methodology to study sex-determinism in our model species.