This claim is true. Octopus is rich in omega 3 fatty acids, which are very beneficial for cardiovascular health. Omega 3's are healthy fats, that are proven to reduce inflammation, and reduce buildup in arteries. Octopus is also low in fat and calories, but high in protein. According to multiple other sources, such as the American heart health association, the unsaturated healthy fats found in octopus is great for lowering cholesterol and the risk of heart disease.