Proteins

Fish Bones

Fish frames and bones simmered briefly to make delicate fumet stock.

Fish bones are the frames, heads-off skeletons, and trimmings left after filleting, used to make fumet, a light fish stock. Unlike meat bones they need only a short simmer to extract flavor without turning bitter. The resulting stock forms the base of sauces, bisques, and seafood soups.

Fish bones—specifically the frames, carcasses, and trimmings left after filleting—are the foundation of fumet, the classic French fish stock. Unlike a hearty meat stock, fumet is delicate, pale, and built on subtlety: a 20–30 minute simmer extracts gelatin and flavor without pulling bitterness from the bones. The result is a crystalline, aromatic liquid that forms the backbone of Provençal and French haute cuisine sauces, soups, and poaching liquids. What makes fish bones unique is their speed and restraint—where a beef stock simmers for hours, a fumet is ready in under half an hour, and overcooking it produces exactly the murky, acrid result you are trying to avoid. Ask your fishmonger to save frames when you buy whole fish; they are usually free or very cheap, and they transform what would be waste into one of the most useful stocks in a seafood cook's arsenal.

The term fumet specifically denotes a fish stock made from bones, almost always with white wine, and it is intentionally concentrated and never reduced to a gel. This distinguishes it from simple fish broth, which may be made from whole fish or with more water and longer cooking. The bones contribute collagen (for body) and trace minerals, while adhering flesh adds flavor—but the flesh also brings impurity that must be strained out. Raw, clean bones from lean white fish (sole, flounder, cod, sea bass, halibut) produce the clearest, most refined fumet. Oily fish are categorically unsuitable: their fat oxidizes during cooking, turning the stock bitter and cloudy in a way no amount of skimming can fix.

Proper preparation of the bones before they hit the pot determines everything. A quick rinse under cold water removes blood and residual slime—both sources of off-flavors. Gills must be cut away entirely; they release bitter, tannic compounds even in short cooking. Some cooks blanch bones briefly in boiling water, drain, and rinse again before starting, especially with older or less pristine material. This extra step is optional but improves clarity noticeably. Once you have clean bones and aromatics ready, the actual cooking is nearly foolproof—just keep the heat gentle and the clock short.

Measured in: g
Storage: Fridge

Allergens

Fish

Types & varieties

Fish Frames

Carcasses remaining after filleting; the preferred starting material — maximum bone with minimal flesh, yielding the clearest fumet

Fish Bones (raw trimmings)

Bones with some adhering flesh; yield richer, more flavorful stock but require more thorough straining

Fish Trimmings

Bones, skin, and small amounts of flesh combined; produce fuller-bodied but cloudier fumet

The Blanching Option

Some chefs blanch bones in boiling water for 2 minutes, drain, and rinse before starting the actual stock. This step is not required but improves results with bones that are not freshly cut or that have been frozen. Blanching removes additional surface impurities and proteins that can cloud the finished fumet. It is especially worth doing if your fishmonger's bones have been sitting for more than a few hours. Simply drop the rinsed bones into rapidly boiling water, let them return to a boil, drain immediately, rinse under cold water, and proceed with the standard fumet method.

Why No Salt?

Do not season fumet during cooking. Salt concentrates as the liquid reduces, and since fumet is often reduced further at the point of use (for sauces, for example), adding it early risks an end result that is far too saline. Season the finished, reduced liquid after tasting. If you are using fumet as a poaching liquid for fish that will be seasoned separately, the unsalted stock lets you control the final dish's seasoning precisely.

Common uses

Fumet as base for fish sauces (such as sauce vin blanc or beurre blanc variants)Risotto ai frutti di mare and paellaSoupe de poisson and bouillabaissePoaching liquid for delicate fish dishesJelly component in aspics and terrinesRice and grain dishes calling for seafood depthSteaming liquid for shellfish and mollusks

Tips & pitfalls

Rinse bones thoroughly in cold water to remove blood and slime — these cause off-flavors in the finished stock
Remove all gills; they release bitter compounds even in a short 20–30 minute simmer
Sauté aromatics (onion, celery, fennel, bay, thyme) before adding bones for complexity
Always start with cold water — it extracts flavor gradually, producing a cleaner result than hot water
Simmer, never boil — vigorous heat clouds the stock and emulsifies fat into the liquid
Add a splash of dry white wine or a few peppercorns; avoid tomato (too heavy and sweet for traditional fumet)
Strain through a fine-mesh strainer lined with damp cheesecloth for maximum clarity
Skim surface impurities during the first 5 minutes of simmering
For clearer results, blanch bones in boiling water for 2 minutes, drain, and rinse before starting
Use an ice water bath to chill finished stock rapidly, then refrigerate or freeze promptly
Do not salt fumet during cooking — reduce and season at the point of use
Optional: add a small amount of leek (white and light green parts only, washed for sand) to the mirepoix

Nutrition

141kcal

Energy

590 kJ · per 100 g

Where the calories come from

Protein 63%Carbs 0%Fat 37%

Protein

21.4g

43% DV

Carbs

0% DV

Fat

5.5g

7% DV

Fiber

0% DV

Sugars

of which

Sodium

391mg

17% DV

Notable micronutrients

Vitamin B12183% DV

Selenium79% DV

Vitamin D48% DV

Niacin (B3)44% DV

Phosphorus28% DV

Vitamin B622% DV

Source · USDA FoodData Central · approx. Fish, salmon, chum, canned, drained solids with bone

View on FDC →

In the shops

Matched grocery products

No matched grocery products for Fish Bones yet.

Good to know

Primary Use: Making fish fumet for classical French and Mediterranean cuisine
Source Fish: Lean white fish: sole, flounder, cod, sea bass, halibut
Avoid: Oily fish (salmon, mackerel, herring, tuna, bluefish) — their fat turns stock bitter
Yield: Approximately 1 quart per 2–3 lbs of bones and frames
Stock Time: Fumet requires only 20–30 minutes of gentle simmering — longer yields bitter, cloudy results
Prep: Rinse bones in cold water; remove gills and any blood clots
Storage (fresh bones): Use same day, or freeze up to 3 months
Storage (finished fumet): Refrigerate up to 2 days; freeze up to 3 months

Substitutes

Shrimp shells — Make a passable shellfish stock for seafood dishes, though distinctly different in flavor profile — shell stocks carry a sweeter, more briny character
Commercially bottled clam juice — Adds briny depth but lacks the subtlety of proper fumet; use as a shortcut only, not as a genuine substitute

Pairs with

Fennel SaffronPernod or pastisTomato paste (minimal)LeekChampagne or dry white wine

Also called

for fumet · Fish Frames · Fish Carcass