Marine toxins are harmful substances produced by certain marine organisms, such as algae, shellfish, and fish. These toxins can accumulate in the food chain and pose health risks to humans and wildlife. Common types of marine toxins include paralytic shellfish toxins and ciguatoxins, which can cause serious illness when ingested. The presence of marine toxins is often linked to environmental factors, such as nutrient pollution and climate change, which can lead to harmful algal blooms. Monitoring and managing these toxins is crucial for ensuring food safety and protecting marine ecosystems.