“…Members of the Family Ostreidae are molluscs that commonly occur in shallow tropical waters (Amaral and Simone, 2014), typically forming specific interrelationships with other invertebrates (O'Connor and Newman, 2001;Sabry and Magalhães, 2005;McDermott, 2006;Radashevsky et al, 2006;Herbert et al, 2009;Martinelli Filho et al, 2014;Ferreira Jr. et al, 2015;Hanke et al, 2015). In Northeast Brazil, Crassostrea brasiliana (Lamarck, 1819) is one of the main oysters characterized by the rounded to ellipsoidal greenish-brownish shells with non-uniform margin, left valve fixed in substrate (such as rock or roots of mangrove) and adductor muscle on dorsal-posterior region, representing 20% of total oyster size (Amaral and Simone, 2014).…”