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![]() ![]() Primary Science Learning Experience PS–36 Green Mussel (Perna viridis) ![]() WHAT IS HAPPENING The large green mussel is a common species found at the inter-tidal areas of the Johor Straits. These shellfish are well adapted to living in muddy waters and attach themselves to rocks, jetty pilings or floating cages by secreting a bunch of silk-like threads called byssus. |