During the last decade have been witnesses of an important development of the methodologies of *secuencación genomic, that has carried to an exponential increase of the knowledge of the eukaryotic genomes. These new technologies Are applying also to the knowledge of the genomes of the marine organisms. This subject pretends to approach to the student to these technological advances, so that it purchase the necessary knowledges to confront to the new challenges of the genomics of the 21st century applied to the study of the half marine.