Bangladesh is one of the world’s leading inland fisheries producers with about 795 native species of fish and shrimp in the fresh and marine waters. About 12 species have been introduced and about 10 species of pearl bearing bivalves, 12 species of edible tortoise and turtle, 15 species of crab and 3 species of lobster can be find (FAO, 2015).

Both the warm and tropical climate and the abundant annual rainfall lead to rich coastal water with a diverse marine life. Therefore we can find a great potential for development of coastal shrimp farming and other aquaculture systems (Shahadat Hossain, 2015).

The two types of aquaculture carried out in Bangladesh can be classified in freshwater and coastal aquaculture. Currently there is no marine aquaculture production. Freshwater aquaculture includes mainly pond aquaculture, whereas coastal aquaculture includes mainly shrimp farming. Aquaculture production systems in Bangladesh can be classified in extensive, extended extensive, semi- intensive and intensive systems (FAO, 2015).

Considering the major regional and global context, fisheries and aquaculture are important, particularly for penaeid shrimp, pomfret, snapper, cat fish and Indian salmon (Shahadat Hossain, 2015). 3.5 per cent of the GDP in Bangladesh contributes to the fisheries sector (Policy Department Economic and Scientific Policy, 2007-2009). It is estimated that about 2.0 million people are full time employed by the fisheries (M. H. Minar et. al. 2013). About 80 per