Jesús Tomás, researcher of the Institute Cavanilles of Biodiversity and Evolutionary Biology (ICBIBE), situated in the Scientific Park of the Universitat of Valencia, and Olga Novillo, student of doctorate of this Institute, present an investigation on the Micro Plastics, that are plastic lower of five millimetres. The impact of these contaminantes can become very harmful for the health of the marine fauna and of the Mediterranean.