Toxic red tide along Massachusetts coast prompts shellfishing ban

BOSTON — A toxic red tide that has emerged in the waters along the Massachusetts coastline has resulted in a shellfishing ban, according to state officials.

Red tide is caused by harmful algal blooms that produce toxins that can accumulate in shellfish, making it harmful to eat, according to the Division of Marine Fisheries.

The phenomenon is also known as, Paralytic Shellfish Poisoning, causes the discoloration of the sea surface and contains dangerous, and even lethal levels of neurotoxins.

The shellfishing ban currently extends from the North Shore down to the South Shore, a Paralytic Shellfish Poisoning map indicates.

When toxin levels exceed 80µg (micrograms), affected areas close to allow for sampling of the water. Once three consecutive samples result in levels below 80µg, the areas will reopen.

Shellfish constables and other officials in the affected towns have been since notified.

Biologists continue to monitor the toxins.

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