A foamy surface sludge "which stinks" has coated the sea in parts of Sliema this morning, according to witnesses.
Photos sent to timesofmalta.com show a gelatinous white sludge in the sea close to the Surfside restaurant, one of the most popular beaches.
The sludge has proved to be a headache throughout the summer, reaching areas like St Paul's Bay and Delimara.
READ: 'No overnight solution', Environment Ministry says
A picture uploaded on Facebook this afternoon showed the slime coating the sea in Ġnejna with the caption:
"What is the point of having picturesque beaches if the surface is covered in fish farm slime? And the smell is nauseating."
Another reader sent in a picture this morning saying the smelly sludge made the popular bathing area of St Paul's Bay (near the Barracuda area) unswimmable last Saturday.
Many swimmers are convinced the slime emanates from nearby fish farms, with a fish farm owner recently admitting to the Times of Malta that the industry was polluting local shorelines.
Have photos or video you think are worth sharing? E-mail mynews@timesofmalta.com or send us a message on Facebook.