Harmful algae are naturally occurring phytoplankton that produce biotoxins which negatively affect human, animal and ecosystem health in high concentrations. All types of shellfish can become toxic and unsafe to eat during these events, including clams, oysters, mussels, geoduck and scallops. These algal blooms are sometimes referred to as “Red Tide” but often harmful blooms DO NOT turn the water a reddish-brown color. Toxic shellfish can cause a variety of symptoms including nausea and paralysis, and in extreme cases even death. The Lummi Natural Resources Department, along with the Washington State Department of Health, monitor biotoxin levels in the area and close beaches to harvest when shellfish become unsafe to eat. Check for closures before you dig!

For more biotoxin information see these resources: