Tasmanians are being warned not to consume shellfish taken from waters in the state's southeast amid fears they could be toxic and potentially fatal.
Public health officials on Tuesday issued the warning for mussels, oysters, clams, pipis, scallops and parts of crab or rock lobster.
They may be affected by toxins from an algae outbreak in waterways between Gardners Bay and Port Esperance, including the Huon estuary.
The shellfish poisoning could lead to symptoms including tingling and pins and needles, unsteadiness and weakness, blurred vision and sometimes difficulty talking, swallowing or breathing.
Medical help should be sought immediately.
Shellfish purchased from retailers remains safe to eat because of close monitoring.
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