|Crustacean form a very large group of arthropods, Crustacean physiology includes normal function of crustacean and their parts. They play major role in aquatic ecosystems, and can easily live in all kinds of habitats. Crustaceans exhibit a great variety of forms; the basic crustacean body consists of a number of segments, or somites.The open access journals are peer reviewed scholarly journals of [Journal of Marine Science: Research & Development]. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted. The top open access journals are indexed in SCOPUS, COPERNICUS, CAS, EBSCO and ISI.