NAYANA, P. , B.F.sa.2019-07-052019-07-052013http://krishikosh.egranth.ac.in/handle/1/5810112902The pelagic fish are the one which live in the near-surface waters of the ocean, often far from shore. They are highly migratory and generally show shoaling behaviour. These fishes are known for their rapid growth and, high rates of reproduction, as well as their remarkable swimming speed and stamina (Anon., 2009). Unlike near shore pelagic species or bottom-dwelling fish that spend most of their lives near islands, pelagic fish move freely in the oceanic environment. Pelagic fishes comprise different taxonomic groups, which contribute to their rich species diversity and abundance (Ayyappan et al., 2011). Variations in the distribution and abundance of these nomadic species are often related to differences between their life history profiles, migration patterns and habits that are affected by ever-changing environmental influences, such as water temperature, current patterns and the availability of food (Anon., 2009).Thesis