Tasmanian salmon farm investigates fire

Salmon farming company Tassal is investigating the cause of a fire at one its processing plants in Tasmania's south.

Workers were on Tuesday alerted to some smouldering on an empty fish pen in Nubeena, southeast of Hobart, a Tassal spokesperson said.

The smouldering at the company's Storm Bay Zone was controlled and extinguished immediately, the spokesperson confirmed.

The company believes it started as a result of a process to brand equipment.

"Tassal is conducting an investigation on the cause to prevent re-occurrence," the Tassal spokesperson told AAP in a statement.

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