Low-Carb Seafood Guide
27 items classified under standard Low-Carb guidelines.
How do seafood fare on the Low-Carb diet? The answer depends on carbohydrate content. This guide breaks down all 27 items in this category with their classification, nutritional data, and the reasoning behind each status.
Seafood are universally compatible with Low-Carb. Each item listed here is low enough in carbohydrates to fit within a typical low-carb daily target. The entries below break down the specific nutritional profile so you can choose based on your individual targets — calories, macros, or micronutrients that matter for your goals.
Quick Reference
| Food | Status | Net carbs (per 100g) |
|---|---|---|
| Anchovies | Allowed | 0g |
| Calamari | Allowed | 13.6g |
| Canned Salmon | Allowed | 0g |
| Canned Tuna | Allowed | 0.1g |
| Canned Tuna in Oil | Allowed | 0g |
| Canned Tuna in Water | Allowed | 0g |
| Catfish | Allowed | 0g |
| Clams | Allowed | 3.6g |
| Cod | Allowed | 0g |
| Crab | Allowed | 0g |
| Fish Sticks | Allowed | 20.2g |
| Halibut | Allowed | 0g |
| Lobster | Allowed | 0g |
| Mahi Mahi | Allowed | 0g |
| Mussels | Allowed | 4.7g |
| Oysters | Allowed | 2.7g |
| Salmon | Allowed | 2.3g |
| Sardines | Allowed | 0g |
| Scallops | Allowed | 13.6g |
| Sea Bass | Allowed | 0g |
| Shrimp | Allowed | 53.5g |
| Smoked Salmon | Allowed | 0g |
| Sushi | Allowed | 17.4g |
| Swordfish | Allowed | 0g |
| Tilapia | Allowed | 0g |
| Trout | Allowed | 0g |
| Tuna | Allowed | 2.4g |
Classification Breakdown
27 Allowed — These seafood are low enough in carbohydrates to fit within a typical low-carb daily target.
Low-carb spans from about 150g/day down to 20g/day, so the same food can be in or out depending on which end of the spectrum.
Allowed Seafood (27)
Anchovies
AllowedWith 0g net carbs per 100g, Anchovies earns a Allowed classification on Low-Carb. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 28.9g protein and 9.7g fat, which may factor into overall meal planning. Among the 27 items in this category, anchovies sits at the low end for net carbs — next closest is Canned Salmon at 0g.
Per 100g · Source: USDA FoodData Central
Calamari
AllowedAt 13.6g net carbs per 100g, Calamari falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, calamari also provides 13.8g protein and 13.2g fat per 100g. It ranks among the highest in this category for net carbs. The nearest lower option is Mussels at 4.7g.
Per 100g · Source: USDA FoodData Central
Canned Salmon
AllowedAt 0g net carbs per 100g, Canned Salmon falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, canned salmon also provides 24.6g protein and 378mg sodium per 100g. Among the 27 items in this category, canned salmon sits at the low end for net carbs — next closest is Canned Tuna in Oil at 0g.
Per 100g · Source: USDA FoodData Central
Canned Tuna
AllowedCanned Tuna is classified as Allowed on Low-Carb, with 0.1g net carbs per 100g. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 19g protein and 219mg sodium per serving. Within this category, it falls between Trout and Salmon for net carbs, ranking 17 of 27.
Per 100g · Source: USDA FoodData Central
Canned Tuna in Oil
AllowedAt 0g net carbs per 100g, Canned Tuna in Oil falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, canned tuna in oil also provides 29.1g protein and 8.2g fat per 100g. Among the 27 items in this category, canned tuna in oil sits at the low end for net carbs — next closest is Canned Tuna in Water at 0g.
Per 100g · Source: USDA FoodData Central
Canned Tuna in Water
AllowedWith 0g net carbs per 100g, Canned Tuna in Water earns a Allowed classification on Low-Carb. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 23.6g protein and 377mg sodium, which may factor into overall meal planning. Among the 27 items in this category, canned tuna in water sits at the low end for net carbs — next closest is Catfish at 0g.
Per 100g · Source: USDA FoodData Central
Catfish
AllowedWith 0g net carbs per 100g, Catfish earns a Allowed classification on Low-Carb. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, catfish also provides 16.4g protein per 100g. Among the 27 items in this category, catfish sits at the low end for net carbs — next closest is Cod at 0g.
Per 100g · Source: USDA FoodData Central
Clams
AllowedAt 3.6g net carbs per 100g, Clams falls into the Allowed category under Low-Carb guidelines. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 14.7g protein per serving. It ranks among the highest in this category for net carbs. The nearest lower option is Oysters at 2.7g.
Per 100g · Source: USDA FoodData Central
Cod
AllowedWith 0g net carbs per 100g, Cod earns a Allowed classification on Low-Carb. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, cod also provides 17.8g protein per 100g. Among the 27 items in this category, cod sits at the low end for net carbs — next closest is Crab at 0g.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber | Net Carbs |
|---|---|---|---|---|---|---|
| Atlantic (raw) | 82kcal | 17.8g | 0.7g | 0g | 0g | 0g |
| Pacific (raw) | 84kcal | 20.4g | 0.3g | 0g | — | 0g |
Crab
AllowedAt 0g net carbs per 100g, Crab falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, crab also provides 17.9g protein and 395mg sodium per 100g. Within this category, it falls between Cod and Halibut for net carbs, ranking 7 of 27.
Per 100g · Source: USDA FoodData Central
Fish Sticks
AllowedFish Sticks is classified as Allowed on Low-Carb, with 20.2g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 11g protein and 16.2g fat, which may factor into overall meal planning. It ranks among the highest in this category for net carbs. The nearest lower option is Sushi at 17.4g.
Per 100g · Source: USDA FoodData Central
Halibut
AllowedHalibut is classified as Allowed on Low-Carb, with 0g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 18.6g protein, which may factor into overall meal planning. Within this category, it falls between Crab and Lobster for net carbs, ranking 8 of 27.
Per 100g · Source: USDA FoodData Central
Lobster
AllowedAt 0g net carbs per 100g, Lobster falls into the Allowed category under Low-Carb guidelines. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 20.9g protein and 535mg sodium per serving. Within this category, it falls between Halibut and Mahi Mahi for net carbs, ranking 9 of 27.
Per 100g · Source: USDA FoodData Central
Mahi Mahi
AllowedAt 0g net carbs per 100g, Mahi Mahi falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, mahi mahi also provides 18.5g protein per 100g. Within this category, it falls between Lobster and Sardines for net carbs, ranking 10 of 27.
Per 100g · Source: USDA FoodData Central
Mussels
AllowedWith 4.7g net carbs per 100g, Mussels earns a Allowed classification on Low-Carb. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, mussels also provides 15.1g protein and 362mg sodium per 100g. It ranks among the highest in this category for net carbs. The nearest lower option is Clams at 3.6g.
Per 100g · Source: USDA FoodData Central
Oysters
AllowedAt 2.7g net carbs per 100g, Oysters falls into the Allowed category under Low-Carb guidelines. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 5.7g protein per serving. Within this category, it falls between Tuna and Clams for net carbs, ranking 20 of 27.
Per 100g · Source: USDA FoodData Central
Salmon
AllowedAt 2.3g net carbs per 100g, Salmon falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, salmon also provides 10.8g protein and 17.4g fat per 100g. Within this category, it falls between Canned Tuna and Tuna for net carbs, ranking 18 of 27.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber | Net Carbs |
|---|---|---|---|---|---|---|
| Atlantic (raw) | 142kcal | 19.8g | 6.3g | 0g | 0g | 0g |
| Atlantic (farmed, raw) | 208kcal | 20.4g | 13.4g | 0g | 0g | 0g |
Sardines
AllowedSardines is classified as Allowed on Low-Carb, with 0g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 24.6g protein and 11.5g fat, which may factor into overall meal planning. Within this category, it falls between Mahi Mahi and Sea Bass for net carbs, ranking 11 of 27.
Per 100g · Source: USDA FoodData Central
Scallops
AllowedWith 13.6g net carbs per 100g, Scallops earns a Allowed classification on Low-Carb. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 11.1g protein and 12.5g fat, which may factor into overall meal planning. It ranks among the highest in this category for net carbs. The nearest lower option is Calamari at 13.6g.
Per 100g · Source: USDA FoodData Central
Sea Bass
AllowedWith 0g net carbs per 100g, Sea Bass earns a Allowed classification on Low-Carb. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 18.4g protein, which may factor into overall meal planning. Within this category, it falls between Sardines and Smoked Salmon for net carbs, ranking 12 of 27.
Per 100g · Source: USDA FoodData Central
Shrimp
AllowedWith 53.5g net carbs per 100g, Shrimp earns a Allowed classification on Low-Carb. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 7.1g protein and 17.9g fat, which may factor into overall meal planning. It ranks among the highest in this category for net carbs. The nearest lower option is Fish Sticks at 20.2g.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber | Net Carbs |
|---|---|---|---|---|---|---|
| Raw | 100kcal | 20.4g | 1.4g | 0g | 0g | 0g |
| Cooked | 87kcal | 17.5g | 1.3g | 0g | 0g | 0g |
Smoked Salmon
AllowedSmoked Salmon is classified as Allowed on Low-Carb, with 0g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 18.3g protein and 672mg sodium, which may factor into overall meal planning. Within this category, it falls between Sea Bass and Swordfish for net carbs, ranking 13 of 27.
Per 100g · Source: USDA FoodData Central
Sushi
AllowedAt 17.4g net carbs per 100g, Sushi falls into the Allowed category under Low-Carb guidelines. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 428mg sodium per serving. It ranks among the highest in this category for net carbs. The nearest lower option is Scallops at 13.6g.
Per 100g · Source: USDA FoodData Central
Swordfish
AllowedSwordfish is classified as Allowed on Low-Carb, with 0g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 19.7g protein, which may factor into overall meal planning. Within this category, it falls between Smoked Salmon and Tilapia for net carbs, ranking 14 of 27.
Per 100g · Source: USDA FoodData Central
Tilapia
AllowedAt 0g net carbs per 100g, Tilapia falls into the Allowed category under Low-Carb guidelines. It is low enough in carbohydrates to fit within a typical low-carb daily target. Beyond the primary classification, tilapia also provides 20.1g protein per 100g. Within this category, it falls between Swordfish and Trout for net carbs, ranking 15 of 27.
Per 100g · Source: USDA FoodData Central
Trout
AllowedTrout is classified as Allowed on Low-Carb, with 0g net carbs per 100g. This means it is low enough in carbohydrates to fit within a typical low-carb daily target. It also contains 20.8g protein and 6.6g fat, which may factor into overall meal planning. Within this category, it falls between Tilapia and Canned Tuna for net carbs, ranking 16 of 27.
Per 100g · Source: USDA FoodData Central
Tuna
AllowedTuna is classified as Allowed on Low-Carb, with 2.4g net carbs per 100g. The classification reflects that it is low enough in carbohydrates to fit within a typical low-carb daily target. Nutritionally, it also delivers 15.3g protein and 14.9g fat per serving. Within this category, it falls between Salmon and Oysters for net carbs, ranking 19 of 27.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber | Net Carbs |
|---|---|---|---|---|---|---|
| Fresh (raw) | 144kcal | 23.3g | 4.9g | 0g | 0g | 0g |
| Canned in Water | 90kcal | 19g | 0.9g | 0.1g | — | 0.1g |
| Canned in Oil | 198kcal | 29.1g | 8.2g | 0g | 0g | 0g |