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

Allowed

With 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

210kcalCalories
28.9gProtein
9.7gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Anchovies across all diets

Calamari

Allowed

At 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

234kcalCalories
13.8gProtein
13.2gFat
14.1gCarbs
0.5gFiber
13.6gNet Carbs

Compare Calamari across all diets

Canned Salmon

Allowed

At 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

136kcalCalories
24.6gProtein
4.2gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Canned Salmon across all diets

Canned Tuna

Allowed

Canned 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

85kcalCalories
19gProtein
0.9gFat
0.1gCarbs
0gFiber
0.1gNet Carbs

Compare Canned Tuna across all diets

Canned Tuna in Oil

Allowed

At 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

198kcalCalories
29.1gProtein
8.2gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Canned Tuna in Oil across all diets

Canned Tuna in Water

Allowed

With 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

128kcalCalories
23.6gProtein
3gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Canned Tuna in Water across all diets

Catfish

Allowed

With 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

95kcalCalories
16.4gProtein
2.8gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Catfish across all diets

Clams

Allowed

At 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

86kcalCalories
14.7gProtein
1gFat
3.6gCarbs
0gFiber
3.6gNet Carbs

Compare Clams across all diets

Cod

Allowed

With 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

VariantCaloriesProteinFatCarbsFiberNet Carbs
Atlantic (raw)82kcal17.8g0.7g0g0g0g
Pacific (raw)84kcal20.4g0.3g0g0g

Compare Cod across all diets

Crab

Allowed

At 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

83kcalCalories
17.9gProtein
0.7gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Crab across all diets

Fish Sticks

Allowed

Fish 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

277kcalCalories
11gProtein
16.2gFat
21.7gCarbs
1.5gFiber
20.2gNet Carbs

Compare Fish Sticks across all diets

Halibut

Allowed

Halibut 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

91kcalCalories
18.6gProtein
1.3gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Halibut across all diets

Lobster

Allowed

At 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

97kcalCalories
20.9gProtein
1gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Lobster across all diets

Mahi Mahi

Allowed

At 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

85kcalCalories
18.5gProtein
0.7gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Mahi Mahi across all diets

Mussels

Allowed

With 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

109kcalCalories
15.1gProtein
2.8gFat
4.7gCarbs
0gFiber
4.7gNet Carbs

Compare Mussels across all diets

Oysters

Allowed

At 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

51kcalCalories
5.7gProtein
1.7gFat
2.7gCarbs
0gFiber
2.7gNet Carbs

Compare Oysters across all diets

Salmon

Allowed

At 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

VariantCaloriesProteinFatCarbsFiberNet Carbs
Atlantic (raw)142kcal19.8g6.3g0g0g0g
Atlantic (farmed, raw)208kcal20.4g13.4g0g0g0g

Compare Salmon across all diets

Sardines

Allowed

Sardines 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

208kcalCalories
24.6gProtein
11.5gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Sardines across all diets

Scallops

Allowed

With 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

217kcalCalories
11.1gProtein
12.5gFat
14.1gCarbs
0.5gFiber
13.6gNet Carbs

Compare Scallops across all diets

Sea Bass

Allowed

With 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

97kcalCalories
18.4gProtein
2gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Sea Bass across all diets

Shrimp

Allowed

With 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

VariantCaloriesProteinFatCarbsFiberNet Carbs
Raw100kcal20.4g1.4g0g0g0g
Cooked87kcal17.5g1.3g0g0g0g

Compare Shrimp across all diets

Smoked Salmon

Allowed

Smoked 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

117kcalCalories
18.3gProtein
4.3gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Smoked Salmon across all diets

Sushi

Allowed

At 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

94kcalCalories
2.9gProtein
0.7gFat
18.4gCarbs
1gFiber
17.4gNet Carbs

Compare Sushi across all diets

Swordfish

Allowed

Swordfish 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

121kcalCalories
19.7gProtein
4gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Swordfish across all diets

Tilapia

Allowed

At 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

96kcalCalories
20.1gProtein
1.7gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Tilapia across all diets

Trout

Allowed

Trout 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

148kcalCalories
20.8gProtein
6.6gFat
0gCarbs
0gFiber
0gNet Carbs

Compare Trout across all diets

Tuna

Allowed

Tuna 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

VariantCaloriesProteinFatCarbsFiberNet Carbs
Fresh (raw)144kcal23.3g4.9g0g0g0g
Canned in Water90kcal19g0.9g0.1g0.1g
Canned in Oil198kcal29.1g8.2g0g0g0g

Compare Tuna across all diets