We can eat fish raw because the bacteria that fish may contain is less harmful to humans that bacteria that can be present in other meats from land animals.
land animals are more prone to infections and bacteria in their meat and intestines which can then make us humans sick if we eat them.
However fish are less likely and less prone to bacteria and infections that could infect and harm us humans.
So the fish is safe to eat raw.
We mainly cook meat to kill bacteria in the meat.
However while most raw fish is safe to eat it is still possible to get parasites and health issues from eating raw fish.
So it's always best to cook raw fish before eating it.
For most healthy people who choose to eat raw or undercooked seafood, it may only pose a small health risk but for others the risk can be severe.
Major types of food poisoning that can result from eating raw or undercooked fish and shellfish include Salmonella and Vibrio vulnificus.
Here are a few common types of fish eaten raw: seabass, swordfish, salmon, trout, mackerel, tuna and salmon.
Other types of seafood, like shrimp, crab, scallops, eel and octopus are also widely and safely eaten raw.
Blue marlin, mackerel, sea bass, swordfish, tuna and yellowtail are high in mercury, so limit your consumption of these high-mercury raw fish, since mercury in high amounts can affect your nervous system function.