If you want to get the health benefit of fish oil, you can get it by eating fish or taking supplements. Some fish are rich in omega-3 fatty acids. Those fish are tuna, herring, mackerel, salmon, whale blubber, cod liver, and seal blubber.
8 Most Important Benefits of Fish Oil
 Fish is known as brain food. The reason is that eating fish help people to deal with their psychological problems such as depression, epilepsy, post-traumatic disorder, psychosis, and even Alzheimer’s disease.
 Based on early research, getting fish oil can improve someone’s attention and mental function. It is also believed that fish oil can help eight to thirteen-years-old kids with attention deficit-hyperactivity disorder (ADHD).
 Fish oil can also be used to prevent heart disease or stroke. Some people use fish oil to lower their cholesterol levels or blood pressure. Fish oil has also been used to prevent chest pain, heart failure, prevent blood clots, and high blood pressure after someone gets a heart transplant.