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The Best Fish to Eat on a Keto Diet

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A ketogenic diet (commonly known as the keto diet) is high in protein and fat and low in carbs. It can be difficult to stick to a keto diet unless you expand your gastronomic horizons.

Trying new seafood from reputable seafood wholesalers in the U.K is an excellent way to discover new food favourites. Because it is naturally high in protein and extremely low in carbs, seafood is great for a keto diet. Seafood is leaner than red meat like beef or pork, although it does contain beneficial Omega-3 and Omega-6 fatty acids. When considering seafood home delivery, remember these six fish as they contain the most of these heart-healthy fatty acids:


Salmon is not only flavourful but it is also packed with Omega-3 fatty acids. It is also rich in other essential nutrients such as Vitamin B, Vitamin D, and Selenium. Salmon is great for grilling or broiling—all it needs is a drizzle of olive oil and some salt and pepper. Balsamic-glazed salmon fillets are a quick and easy keto dinner option to consider.


In the world of online fish delivery, mackerel is the underappreciated cousin of salmon. It has pretty much the same amount of Omega-3s and other essential nutrients, but with a more delicate flavour profile. Mackerel tastes great grilled, broiled or pan-fried. Try grilled mackerel with apple and radish salad to get your oily fish fix.


Herring is a nutritious medium-sized fish with a delicate flavour profile similar to mackerel. It is best served cold-smoked, pickled, or precooked. When shopping for herring on an online seafood delivery site, you can find it both canned and fresh. A medium-sized herring fillet is high in Omega-3 fatty acids and vitamin B12, Vitamin D, and Selenium. One must-try herring recipe is grilled herrings with mustard and basil dressing.


Oysters are surprisingly high in nutrients. A serving of oysters will provide your body with Zinc, Copper, and Vitamin B12 in addition to Omega-3 fatty acids. These tiny delights can be consumed either cooked or raw. Grilled oysters with some parsley, garlic and tabasco is keto-friendly and mouthwateringly good.


Tuna is a versatile and flavourful fish. While canned tuna is the most popular here in the U.K., fresh tuna has a delightfully rich, crispy texture. It is high in essential nutrients such as Selenium, Vitamin B12, Vitamin D, and Omega-3 fatty acids. Tuna steaks are delicious fresh off the grill, pan-fried, or broiled. If you like tuna salad, you should try this dish with fresh tuna!


Mahi-mahi is a delectable white fish with a delicate, sweet flavour. It has a low-fat content but a high protein content. It contains a lot of Omega-3 fatty acids and B vitamins. It tastes great grilled, baked, or pan-fried. Give mahi-mahi a try with a Garlicky Lemon Mahi-Mahi recipe.

While these six fish contain the most Omega-3 fatty acids, you can get this essential nutrient from several other fish as well. At Seafood Direct, we offer a wide selection of responsibly sourced premium frozen seafood—and we can also help you find the best fish for the keto seafood recipe you are planning to make. If you are looking for fresh seafood delivery in London, visit today.

Do you have any questions about our service of fish delivery in the U.K.? Call us at 01472 566000 or write to us at One of our representatives will get back to you shortly!

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