Gluten-Free Seafood Guide
27 items classified under standard Gluten-Free guidelines.
How do seafood fare on the Gluten-Free diet? The answer depends on whether the food contains gluten from wheat, barley, or rye. This guide breaks down all 27 items in this category with their classification, nutritional data, and the reasoning behind each status.
Good news for Gluten-Free followers: almost all seafood fit the diet. These foods are naturally free of wheat, barley, rye, and their gluten proteins. The nutrition details below help you compare within the category to find the best options for your specific needs.
Quick Reference
| Food | Status | Calories (per 100g) |
|---|---|---|
| Anchovies | Allowed | 210kcal |
| Calamari | Allowed | 234kcal |
| Canned Salmon | Allowed | 136kcal |
| Canned Tuna | Allowed | 85kcal |
| Canned Tuna in Oil | Allowed | 198kcal |
| Canned Tuna in Water | Allowed | 128kcal |
| Catfish | Allowed | 95kcal |
| Clams | Allowed | 86kcal |
| Cod | Allowed | 82kcal |
| Crab | Allowed | 83kcal |
| Halibut | Allowed | 91kcal |
| Lobster | Allowed | 97kcal |
| Mahi Mahi | Allowed | 85kcal |
| Mussels | Allowed | 109kcal |
| Oysters | Allowed | 51kcal |
| Salmon | Allowed | 213kcal |
| Sardines | Allowed | 208kcal |
| Scallops | Allowed | 217kcal |
| Sea Bass | Allowed | 97kcal |
| Shrimp | Allowed | 426kcal |
| Smoked Salmon | Allowed | 117kcal |
| Sushi | Allowed | 94kcal |
| Swordfish | Allowed | 121kcal |
| Tilapia | Allowed | 96kcal |
| Trout | Allowed | 148kcal |
| Tuna | Allowed | 206kcal |
| Fish Sticks | Limited | 277kcal |
Classification Breakdown
26 Allowed — These seafood are naturally free of wheat, barley, rye, and their gluten proteins. 1 Limited — These items have usually gluten-free in plain form but commonly cross-contaminated.
For celiac disease the threshold is 20 ppm, and cross-contamination matters as much as ingredients.
Allowed Seafood (26)
Anchovies
AllowedAt 210kcal calories per 100g, Anchovies falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 28.9g protein and 9.7g fat per serving. It ranks among the highest in this category for calories. The nearest lower option is Sardines at 208kcal.
Per 100g · Source: USDA FoodData Central
Calamari
AllowedWith 234kcal calories per 100g, Calamari earns a Allowed classification on Gluten-Free. It is naturally free of wheat, barley, rye, and their gluten proteins. 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 calories. The nearest lower option is Scallops at 217kcal.
Per 100g · Source: USDA FoodData Central
Canned Salmon
AllowedCanned Salmon is classified as Allowed on Gluten-Free, with 136kcal calories per 100g. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 24.6g protein and 378mg sodium, which may factor into overall meal planning. Within this category, it falls between Canned Tuna in Water and Trout for calories, ranking 17 of 27.
Per 100g · Source: USDA FoodData Central
Canned Tuna
AllowedCanned Tuna is classified as Allowed on Gluten-Free, with 85kcal calories per 100g. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 19g protein and 219mg sodium, which may factor into overall meal planning. Among the 27 items in this category, canned tuna sits at the low end for calories — next closest is Mahi Mahi at 85kcal.
Per 100g · Source: USDA FoodData Central
Canned Tuna in Oil
AllowedWith 198kcal calories per 100g, Canned Tuna in Oil earns a Allowed classification on Gluten-Free. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 29.1g protein and 8.2g fat, which may factor into overall meal planning. Within this category, it falls between Trout and Tuna for calories, ranking 19 of 27.
Per 100g · Source: USDA FoodData Central
Canned Tuna in Water
AllowedAt 128kcal calories per 100g, Canned Tuna in Water falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, canned tuna in water also provides 23.6g protein and 377mg sodium per 100g. Within this category, it falls between Swordfish and Canned Salmon for calories, ranking 16 of 27.
Per 100g · Source: USDA FoodData Central
Catfish
AllowedWith 95kcal calories per 100g, Catfish earns a Allowed classification on Gluten-Free. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 16.4g protein, which may factor into overall meal planning. Within this category, it falls between Sushi and Tilapia for calories, ranking 9 of 27.
Per 100g · Source: USDA FoodData Central
Clams
AllowedAt 86kcal calories per 100g, Clams falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, clams also provides 14.7g protein per 100g. Among the 27 items in this category, clams sits at the low end for calories — next closest is Halibut at 91kcal.
Per 100g · Source: USDA FoodData Central
Cod
AllowedAt 82kcal calories per 100g, Cod falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 17.8g protein per serving. Among the 27 items in this category, cod sits at the low end for calories — next closest is Crab at 83kcal.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber |
|---|---|---|---|---|---|
| Atlantic (raw) | 82kcal | 17.8g | 0.7g | 0g | 0g |
| Pacific (raw) | 84kcal | 20.4g | 0.3g | 0g | — |
Crab
AllowedWith 83kcal calories per 100g, Crab earns a Allowed classification on Gluten-Free. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, crab also provides 17.9g protein and 395mg sodium per 100g. Among the 27 items in this category, crab sits at the low end for calories — next closest is Canned Tuna at 85kcal.
Per 100g · Source: USDA FoodData Central
Halibut
AllowedHalibut is classified as Allowed on Gluten-Free, with 91kcal calories per 100g. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 18.6g protein per serving. Within this category, it falls between Clams and Sushi for calories, ranking 7 of 27.
Per 100g · Source: USDA FoodData Central
Lobster
AllowedAt 97kcal calories per 100g, Lobster falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, lobster also provides 20.9g protein and 535mg sodium per 100g. Within this category, it falls between Tilapia and Sea Bass for calories, ranking 11 of 27.
Per 100g · Source: USDA FoodData Central
Mahi Mahi
AllowedWith 85kcal calories per 100g, Mahi Mahi earns a Allowed classification on Gluten-Free. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, mahi mahi also provides 18.5g protein per 100g. Among the 27 items in this category, mahi mahi sits at the low end for calories — next closest is Clams at 86kcal.
Per 100g · Source: USDA FoodData Central
Mussels
AllowedWith 109kcal calories per 100g, Mussels earns a Allowed classification on Gluten-Free. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 15.1g protein and 362mg sodium, which may factor into overall meal planning. Within this category, it falls between Sea Bass and Smoked Salmon for calories, ranking 13 of 27.
Per 100g · Source: USDA FoodData Central
Oysters
AllowedAt 51kcal calories per 100g, Oysters falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, oysters also provides 5.7g protein per 100g. Among the 27 items in this category, oysters sits at the low end for calories — next closest is Cod at 82kcal.
Per 100g · Source: USDA FoodData Central
Salmon
AllowedSalmon is classified as Allowed on Gluten-Free, with 213kcal calories per 100g. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 10.8g protein and 17.4g fat per serving. It ranks among the highest in this category for calories. The nearest lower option is Anchovies at 210kcal.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber |
|---|---|---|---|---|---|
| Atlantic (raw) | 142kcal | 19.8g | 6.3g | 0g | 0g |
| Atlantic (farmed, raw) | 208kcal | 20.4g | 13.4g | 0g | 0g |
Sardines
AllowedSardines is classified as Allowed on Gluten-Free, with 208kcal calories per 100g. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 24.6g protein and 11.5g fat per serving. It ranks among the highest in this category for calories. The nearest lower option is Tuna at 206kcal.
Per 100g · Source: USDA FoodData Central
Scallops
AllowedAt 217kcal calories per 100g, Scallops falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 11.1g protein and 12.5g fat per serving. It ranks among the highest in this category for calories. The nearest lower option is Salmon at 213kcal.
Per 100g · Source: USDA FoodData Central
Sea Bass
AllowedAt 97kcal calories per 100g, Sea Bass falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 18.4g protein per serving. Within this category, it falls between Lobster and Mussels for calories, ranking 12 of 27.
Per 100g · Source: USDA FoodData Central
Shrimp
AllowedWith 426kcal calories per 100g, Shrimp earns a Allowed classification on Gluten-Free. This means it is naturally free of wheat, barley, rye, and their gluten proteins. 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 calories. The nearest lower option is Fish Sticks at 277kcal.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber |
|---|---|---|---|---|---|
| Raw | 100kcal | 20.4g | 1.4g | 0g | 0g |
| Cooked | 87kcal | 17.5g | 1.3g | 0g | 0g |
Smoked Salmon
AllowedAt 117kcal calories per 100g, Smoked Salmon falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 18.3g protein and 672mg sodium per serving. Within this category, it falls between Mussels and Swordfish for calories, ranking 14 of 27.
Per 100g · Source: USDA FoodData Central
Sushi
AllowedSushi is classified as Allowed on Gluten-Free, with 94kcal calories per 100g. This means it is naturally free of wheat, barley, rye, and their gluten proteins. It also contains 428mg sodium, which may factor into overall meal planning. Within this category, it falls between Halibut and Catfish for calories, ranking 8 of 27.
Per 100g · Source: USDA FoodData Central
Swordfish
AllowedAt 121kcal calories per 100g, Swordfish falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, swordfish also provides 19.7g protein per 100g. Within this category, it falls between Smoked Salmon and Canned Tuna in Water for calories, ranking 15 of 27.
Per 100g · Source: USDA FoodData Central
Tilapia
AllowedAt 96kcal calories per 100g, Tilapia falls into the Allowed category under Gluten-Free guidelines. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 20.1g protein per serving. Within this category, it falls between Catfish and Lobster for calories, ranking 10 of 27.
Per 100g · Source: USDA FoodData Central
Trout
AllowedTrout is classified as Allowed on Gluten-Free, with 148kcal calories per 100g. The classification reflects that it is naturally free of wheat, barley, rye, and their gluten proteins. Nutritionally, it also delivers 20.8g protein and 6.6g fat per serving. Within this category, it falls between Canned Salmon and Canned Tuna in Oil for calories, ranking 18 of 27.
Per 100g · Source: USDA FoodData Central
Tuna
AllowedAt 206kcal calories per 100g, Tuna falls into the Allowed category under Gluten-Free guidelines. It is naturally free of wheat, barley, rye, and their gluten proteins. Beyond the primary classification, tuna also provides 15.3g protein and 14.9g fat per 100g. Within this category, it falls between Canned Tuna in Oil and Sardines for calories, ranking 20 of 27.
Per 100g · Source: USDA FoodData Central
| Variant | Calories | Protein | Fat | Carbs | Fiber |
|---|---|---|---|---|---|
| Fresh (raw) | 144kcal | 23.3g | 4.9g | 0g | 0g |
| Canned in Water | 90kcal | 19g | 0.9g | 0.1g | — |
| Canned in Oil | 198kcal | 29.1g | 8.2g | 0g | 0g |
Limited Seafood (1)
Fish Sticks
LimitedAt 277kcal calories per 100g, Fish Sticks falls into the Limited category under Gluten-Free guidelines. The classification reflects that it is usually gluten-free in plain form but commonly cross-contaminated. Nutritionally, it also delivers 11g protein and 16.2g fat per serving. It ranks among the highest in this category for calories. The nearest lower option is Calamari at 234kcal. Portion control is key here — a small amount may fit within the diet's parameters, while a full serving may not.
Per 100g · Source: USDA FoodData Central