I work on zooplankton Ecology. My PH. D. Thesis was on Antarctic krill. After I finish my thesis I came back to México, my country, and start to work on euphausiids from the tropical Pacific. My more recent work is related to the tropical Mexican Pacific and also the Gulf of México. We have recently work on the vertical distribution of zoplankton in the Oxygen Minimum Zone (OMZ) off México. We also work on the zooplankton adaptations to low oxygen. I am still demanded for reviewing paper from Antarctica, so still active on that area and very interested to continue my former research on the morphology and biochemical compostion of euphausiids and its consequences on the physiology and biochemical composition of the species, mainly euphausiids.