Chitin is distinguished from chitosan by the higher proportion of N-acetyl-d-glucosamine over d-glucosamine in the polymer chain, with typically more than 95% N-acetyl-d-glucosamine and less than 5% d-glucosamine being found in chitin derived from crab shells, shrimp shells and squid pens ( Rinaudo, 2006 and Sagheer et al., 2009). Taking into account the arrangement of the chitin polymer in its native form, two major types of chitin can be observed: the α-chitin found in shrimp shells and the β-chitin found in squid pens. These two types of chitin were well characterized (Rinaudo, 2006).