This detailed volume provides an overview of recent advances in the application of genomic technologies in several domains of marine biology, raising awareness of various DNA- and RNA-based technologies. Genomic methods are essential in identifying previously undetected taxonomic (e.g. DNA barcoding), genetic (e.g. sequencing), and functional (e.g. gene expression, analysis of metabolites) diversity, as shown in the chapters of this book, with sections focusing on next generation sequencing (NGS) technologies, bioinformatics in marine genomics research, marine biotechnology, as well as a variety of methods successfully applied in fish. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.