CALL: Seeking records of Polydora websteri in Europe

Dark blisters inside the oyster shell caused by Polydora websteri. Photo: Anna-Lisa Wrange

In October 2020, the mud blister worm Polydora websteri was observed for the first time in Sweden (genetically verified), in a natural Pacific oyster bed (Crassostrea gigas) close to Lysekil on the Swedish west coast. The worm is a known invader, originating …

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