The adult scallop can move along the sea floor by snapping its shell shut and squirting out water. Like many other marine molluscs, scallops are broadcast spawners – females and males release eggs and sperm into the sea water, and the propagation of young is entrusted to chance. Currents take them off, to live if they find a suitable habitat, or die if they do not. Scallops survived these currents – the species drifted on the East Australian Current from Australia to New Zealand.
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