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A symbiotic polychaete known only until now from a single record in Congo is now reported from European waters by an international team leaded by CEAB scientists

The hesionid polychaete Parasyllidea humesi was only known from its original description, living in association with the bivalve Tellina nymphalis in mangrove swamps of the Republic of Congo. The discovery of a stable population associated to another bivalve, Scrobicularia plana, at the Gulf of Cádiz (Atlantic coast of Iberian Peninsula) represents the second known report worldwide, and the first for European waters.