High levels of shellfish toxins have been found in Loch Leurbost in Lewis.
Eating shellfish such as mussels, cockles, or razor fish from these areas may pose a risk to human health.
Notices to warn people and casual gatherers have been posted at various locations on the shore.
Commercial shellfish harvesters in these areas have been contacted by the comhairle and steps taken to postpone harvesting until algae levels subside.
A comhairle spokesman said: "It is a sensible precaution to avoid eating shellfish from these areas until further notice.
"The council is monitoring the situation and will remove warning notices when it improves."
High levels of shellfish toxin in sealoch
14 July 2016