Best Seafood to Eat on a Keto Diet

A ketogenic or keto diet is high in protein, high in fats, and extremely low in carbohydrates. Sticking to this diet can be tough unless you expand your culinary horizons. Trying out new fish and shellfish is a great way to find new favorites and comfort foods. Seafood is ideal for a keto diet since it’s naturally high in protein and low in carbs. Seafood is leaner than red meats, but it contains healthy omega-3 and omega-6 fatty acids. These four fish have the highest amount of these heart-healthy fatty acids.

Fresh Fish Market In Rhode Island, CT


Salmon not only has a rich flavor, but it’s also rich in omega-3 fatty acids (approx. 4,123 mg in half a fillet). It’s also packed with other valuable nutrients, including B vitamins, vitamin D, and selenium. This hearty fish is ideal for grilling or broiling. All it needs is a light dusting of olive oil and a dash of salt and pepper. You may also enjoy it drizzled with a tasty dressing like this Salmon With Mustard Vinaigrette.


Mackerel is salmon’s underrated cousin. It’s equally packed with omega-3s and other nutrients, but it has a milder flavor. It pairs well with citrus marinades and fresh herbs. It can be grilled, broiled, or pan-fried.


Here’s an excellent, keto-friendly recipe to try out this tantalizing fish: Pan-Seared Mackerel With Sweet Peppers and Thyme.


Herring is a medium-sized fish with a mild flavor that’s full of nutrients. It is popularly served cold-smoked, pickled, or precooked. You can find it both canned and fresh at fish markets. A medium-sized herring fillet is packed with 946 mg of omega-3s along with vitamin B12, vitamin D, and selenium. Try it Pickled in a Sour Cream Sauce on top of a bed of greens.


Oysters are unexpectedly nutritious. Along with omega-3 fatty acids, a serving of oysters will meet your body’s need for zinc and copper along with vitamin B12. These little delicacies can be enjoyed cooked or raw. This recipe for Mardi Gras Grilled Oysters is keto-friendly and mouthwateringly good. You can enjoy far more than just these four fish on a keto diet! While these four types of seafood have the highest amount of omega-3 fatty acids, you can get this vital nutrient from many other seafoods.

Here are a few other popular fish to eat on a keto diet:

Fresh Tuna Fish Market in Western, CT


Tuna is a versatile fish with a rich flavor. While canned tuna is the most popular in the U.S., fresh tuna has a satisfyingly dense, flaky texture. It is packed with essential nutrients like selenium, vitamin B12, and vitamin D, along with fatty acids. Tuna steaks taste lovely fresh off the grill, pan-fried or broiled. If you are already a fan of tuna salad, give this recipe with fresh tuna a try!


Mahi-mahi is a delicious white fish with a mild, sweet flavor. It’s low in fat but high in protein with 24 grams per serving. It’s an excellent source of omega-3 fatty acids and B vitamins. This versatile fish can be used in many recipes that call for white fish. You can enjoy it grilled, baked or pan-fried. Give mahi-mahi a try with this Chili Lime Butter recipe.

Shrimp & Bay Scallops

Shrimp and bay scallops are small, tender shellfish. While both are low in fat, they are high in protein. They pair well with creamy, buttery sauces that a perfect for a keto meal. Check out this shrimp scampi recipe that would be wonderful over spaghetti squash!

Browse through our blog to find more keto-friendly seafood recipes and tips on how to prepare seafood at home! You can find the best seafood in Connecticut at City Fish Market. The attendants at our seafood counter can help you find the best fillets or shellfish for dinner tonight.


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