Domoic acid is a naturally occurring toxin produced by certain types of algae, particularly those in the genus Pseudo-nitzschia. It can accumulate in marine organisms, such as shellfish and fish, which can pose health risks to humans and animals that consume them. When ingested, domoic acid can lead to a condition known as amnesic shellfish poisoning (ASP), characterized by symptoms like nausea, vomiting, and in severe cases, memory loss or seizures. Monitoring and regulating seafood for domoic acid levels is essential to ensure public health and safety.