Canned Sardine Labels: Oil vs Water, Drained Weight and Sodium
A sardine can is small, but its label answers more questions than it seems to: what the fish is packed in, whether skin and bones are still there, how much of the weight is fish and how much is liquid, and how much sodium the whole can holds. This guide walks through each part using Wild Planet Wild Sardines in Extra Virgin Olive Oil with Lemon as the worked example.
How we wrote this: label details come from the Wild Planet Sardines with Lemon page, which shows the ingredient list, the Nutrition Facts panel and the brand’s sourcing text, read in October 2026. The rules come from the reference amounts (RACC) in 21 CFR 101.12 and the sodium claim definitions in 21 CFR 101.61. Our canned fish label guide already covers wild vs farmed rules, species names and the MSC mark in depth, so this guide focuses on what is specific to sardines. We read labels and rules; we did not lab test or taste test anything.
The short answer
Read the ingredient list to see the packing liquid, the serving line to see how much fish the panel describes, and the sodium row, which on a single-serving can is the sodium for the whole can. Treat words like “wild,” “scale-free” and “skinless and boneless” as the brand’s descriptions, and give a logo only the meaning the mark itself states.
Step 1: Olive oil, water or tomato sauce
The packing liquid is an ingredient, so it appears in the ingredient list in order of weight. The three common styles read differently:
- In olive oil: check which oil. “Olive oil” and “extra virgin olive oil” are different grades, and some cans use other oils. Our olive oil label guide explains the grade names. Wild Planet’s list reads: sardines (Sardinops sagax or Sardinops melanostictus), organic extra virgin olive oil, water, lemon, sea salt, aqueous natural smoke. So this can holds water as well as oil.
- In water: usually the fish, water and salt.
- In tomato sauce: the sauce brings its own ingredients, such as tomato, oil, spices and sometimes sugar. Check the added sugars row and the full list, and read the allergen statement for each flavor separately.
Step 2: Net weight vs drained weight
The net weight on a can counts everything inside: fish plus oil, water or sauce. The Nutrition Facts serving usually does not. The FDA reference amount for canned fish is 85 g, and a footnote in 21 CFR 101.12 says that if a food is packed or canned in liquid, the reference amount is for the drained solids, except for products where the solids and liquid are customarily eaten together. The same table lists a serving format of 3 oz (85 g) for canned fish.
Our example shows the gap. The can is 4.375 oz (about 124 g), while the panel lists a serving size of 3 oz (85 g) and 1 serving per container. By our arithmetic, that leaves about 1.4 oz (about 39 g) of the net weight outside the serving, which is the packing liquid and lemon. The label does not break that part down.
Two practical points follow:
- Compare cans by the serving line, not the net weight. A can with more liquid can show a bigger net weight without holding more fish.
- If you eat the oil too, you eat more than the panel serving. The panel describes the drained fish, so the oil you pour over toast is extra.
For tomato sauce styles, the exception in the footnote may apply, since the sauce is often eaten with the fish. The serving line tells you which way the brand has labeled it.
Step 3: Skinless and boneless, and scale-free
Traditional canned sardines are packed whole or as cleaned pieces, with the skin and the small bones left in, and both are eaten with the fish. “Skinless and boneless” cans have had the skin and backbone removed. Neither phrase is defined in the federal rules we read, so they are descriptions of how the fish was prepared.
Wild Planet describes its sardines as “meaty and scale-free,” meaning the scales have been removed. The page does not describe them as skinless or boneless. If the style matters to you, look for those words on the front of the can rather than assuming.
The style can change the panel, so compare the rows rather than the name. Our example lists calcium at 25% DV per serving; a skinless and boneless can from the same or another brand prints its own figure.
Step 4: Sodium per can
Because the example is labeled as 1 serving per container, the sodium row is the sodium for the whole can: 180 mg, 8% DV, per 3 oz (85 g). On a can with 2 or more servings, multiply the row by the servings you eat.
Front-of-can sodium words are defined in 21 CFR 101.61. For a food with a reference amount above 30 g, such as canned fish at 85 g:
- Very low sodium: 35 mg or less per reference amount.
- Low sodium: 140 mg or less per reference amount.
At 180 mg per 85 g, our example sits above the low sodium line, so it does not carry that claim. On the FDA’s quick guide, 8% DV falls between low (5% or less) and high (20% or more); our guide to reading a Nutrition Facts label explains the %DV column. Sodium varies by flavor within one brand, so read the row on each can. For “no salt added” wording, see the canned fish guide.
Step 5: Wild-caught and sustainability marks
On a can, “wild” is the brand’s word; the canned fish guide explains why the USDA wild or farm-raised rule does not cover canned fish. Wild Planet states that its sardines are caught with single-species purse seine methods, that FADs (fish aggregating devices) are never used, that incidental bycatch is retained and used, and that the fish come from the North Pacific Ocean, from fisheries in Japan. Those are the brand’s own statements about its sourcing.
A logo is different, but only as far as its owner says. Say what the mark states and no more. The Wild Planet page lists this can as Non-GMO Project Verified and kosher, and the brand lists it as gluten-free. A Non-GMO Project mark speaks to GMO status, not to how the fish was caught. The page does not show a fishery sustainability mark such as the MSC label, so any sustainability claim here rests on the brand’s statements.
Other rows on the panel
Per 3 oz (85 g), the Wild Planet panel lists 170 calories; 11 g total fat (14% DV), of which 3.5 g saturated; 0 g carbohydrate and 0 g sugars; and 17 g protein (34% DV). It also lists vitamin D at 45% DV, calcium at 25%, iron at 15% and potassium at 4%. Fish is one of the major food allergens, so the can is not for anyone with a fish allergy.
A quick checklist
- Read the ingredient list for the packing liquid and its grade.
- Compare cans by the serving line, not the net weight.
- Check servings per container before reading the sodium row as per can.
- Look for “skinless and boneless” on the front if you want that style.
- Give each logo only the meaning its owner states.
FAQ
Why is the serving smaller than the can?
For fish packed in liquid, the FDA reference amount is for the drained solids. Our example is a 4.375 oz can with a 3 oz (85 g) serving.
Is a can of sardines in olive oil low sodium?
Not this one. Low sodium for canned fish means 140 mg or less per 85 g, and the example lists 180 mg.
Are skinless and boneless sardines a different product?
They are a different preparation of the same kind of fish. Read the front of the can for the wording and the panel for the numbers.
Does “wild” on a sardine can have a legal definition?
Not on canned fish. It is the brand’s description; look for a named fishing area or method to back it up.
Where to go next
For more shelf-stable picks, see our pantry staples guide and all pantry products. Our seed label guide uses the same per-serving math for hemp and flax.