Growth studies have been conducted in populations of this species in the Red Sea ( Yassien, 1998), Qatar ( Mohammed and Yassien, 2003), India (Narayan and Michael, 1968 Jeyabaskaran et al., 1983), Japan ( Wada, 1991), Taiwan ( Hwang et al., 2007) and in the Mediterranean Sea ( Yassien et al., 2000). Its maximum lifespan is 8 years, although older specimens have been found. imbricata radiata is an epifaunal suspension feeder of the subtidal zone and a fouling species, living attached by its byssus to hard substrata. The biology of pearl oysters is poorly understood, considering the importance of both natural and cultured pearl, and shell fisheries ( Gervis and Sims, 1992).
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