Monitoring work carried out by Argyll and Bute Council's Environmental Health service has identified raised levels of naturally occurring algal toxins in two lochs within the area.
West Loch Tarbert and Loch Scridain on Mull have been closed because of the high levels of algal toxins. The Ardkinglas area of Loch Fyne has been closed since May for the same reason, and Loch Striven since last Thursday.
Eating shellfish such as cockles, mussels or razor fish from these areas may pose a risk to human health and notices to warn the public and casual gatherers have been posted at various locations on the shore. It is a sensible precaution to avoid eating shellfish from these areas until further notice.
Commercial shellfish harvesters in these areas have been contacted by the Council and steps taken to postpone harvesting until algae levels subside.
The Stonefield area of Loch Fyne and Loch Melfort and Seil Sound have also been closed recently because of the problem, but have now reopened.
The Council is continuing to monitor the situation and will issue a further statement when levels subside.
For further information, please contact 01631 567920