MUSSEL is a marine MOLLUSC belonging to the class Bivalvia. Its soft body is enclosed in a hinged shell with 2 halves (valves). Several species occur in BC waters. The most common species live in dense colonies attached to rocks, pilings or other hard surfaces; others live in the substrate. The shell is anchored by a bundle of fine threads known as the byssus, made from the mucus of a special gland. Most familiar is the Pacific blue (bay) mussel (Mytilus trossulus), which has a dark blue to...

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