A new warning about high levels of shellfish toxins has been issues for several large lochs in Lewis and Harris.
Monitoring work undertaken on behalf of Food Standards Scotland has identified raised levels of shellfish toxins in Loch Leurbost in Lewis and Loch Seaforth and East Loch Tarbert in Harris..
Comhairle nan Eilean Siar say that: "Eating shellfish such as mussels, cockles, or razor fish from these areas may pose a risk to human health.
"Commercial shellfish harvesters in these areas have been contacted by the Comhairle and steps have been taken to postpone harvesting until toxin levels subside.
"It is a sensible precaution to avoid eating shellfish from these lochs until further notice."