An introduced soft-shell clam has been found on a Tasmanian river beach following a storm, prompting an environmental investigation.
The northern hemisphere's mya japonica species may have been present in the Prosser River, Orford, for a while as a shell was found in the area in 2013, although a subsequent survey was unfruitful, the Tasmanian government said in a statement.
The exact source of the incursion is not known and investigations are ongoing, the statement said.
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