William is Brazilian, biologist (Universidade Federal Rural de Pernambuco), master in Biodiversity and Marine Ecology (Universidade Federal de São Paulo), and now is Phd student at the Deep-Sea Lab (L'Institut français de recherche pour l'exploitation de la mer - IFremer) under the supervision of Jozée Sarrazin, Marjolaine Matabos and Pierre-Antoine Dessandier. Since the beginning of his career, William has investigated the ecology, evolution and taxonomy of a community called meiofauna, small animals that live on the sea floor. These animals perform important ecosystem functions such as nutrient cycling and organic matter decomposition, and can be found from calm environments to extreme environments, such as hydrothermal vents. Therefore, the aim of William's thesis is to investigate the resilience of meiofauna in relation to induced disturbances in the Lucky Strike vent field. Its data have been obtained in the Mid Atlantic Ridge and represent an important opportunity to reveal impacts of exploration in the deep-sea and ecological properties still little studied for meiofauna. Along with ecological aspects, William investigates the taxonomy of free-living marine nematodes, one of the most abundant animal groups on Earth, with high species and functional diversity. In addition to his thesis, William researches topics such as Brazilian literature, racial anthropology and political science.