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At present, relatively little is known of the biology of this species.   The fan mussel occurs solitarily or in small groups and feeds by filtering organic particles from the water (2). Fertilisation is external, and success is affected by the proximity of other individuals as well as a range of environmental factors (4). The larvae undergo a planktonic phase that lasts for five to ten days (3). Studies of annual growth rings on the shells have suggested that fan mussels grow at a rate of 3-4 cm per year (3). Based on this rate of growth, it is thought that the largest individuals are 10-12 years old, and possibly even older (4). The upper, exposed parts of the shells are often damaged, leaving sharp edges, but the shell is repaired quickly (4).


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Source: ARKive

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