Cuts

Fish — Fabrication & Breakdown

Whole Fish — Backbone Removal for Grilling (Spatchcock Fish)

Also: spatchcocked fish, butterflied whole fish, boned-out whole fish for grilling, fish opened flat

A whole fish deboned through the belly or back while the two sides remain joined at the skin, laid flat for even, fast grilling over charcoal or in a plancha.

Spatchcocking a fish — by analogy with the poultry technique — means removing the backbone (and sometimes rib cage) while leaving both sides of the fish attached at the dorsal or ventral skin, so the whole fish can lie completely flat on the grill. This dramatically increases contact area with the heat source, halves cooking time compared to a whole round fish, and solves the chronic problem of the fish curling away from the grill. It is distinct from the small-fish butterfly fillet technique (herring/sardine) in scale and in the entry point: for a medium-to-large fish the approach differs by tradition — through the belly (Persian and Latin American schools) or through the back (some Japanese and Levantine methods).

In photos

Whole Fish — Backbone Removal for Grilling (Spatchcock Fish) in its raw whole-cut form on a butcher's board — Spatchcocking a fish — by analogy with the poultry technique — means removing the backbone (and sometimes rib cage) while leaving both sides of the fish attached at the dorsal or ventral skin, so the… Identifying traits: Lies perfectly flat on the grill, eliminating the curved-fish-rounding problem, Cooks in roughly half the time of a whole round fish, Skin on both exterior surfaces crisps evenly.
Whole Fish — Backbone Removal for Grilling (Spatchcock Fish) in its raw whole-cut form on a butcher's board — Spatchcocking a fish — by analogy with the poultry technique — means removing the backbone (and sometimes rib cage) while leaving both sides of the fish attached at the dorsal or ventral skin, so the… Identifying traits: Lies perfectly flat on the grill, eliminating the curved-fish-rounding problem, Cooks in roughly half the time of a whole round fish, Skin on both exterior surfaces crisps evenly.
Where the whole fish — backbone removal for grilling (spatchcock fish) lives on the source. Applied to medium-to-large round fish: sea bass (Dicentrarchus labrax), red snapper, branzino, sea bream (Sparus aurata), tilapia, whole trout, striped bass, gilt-head bream, and larger sardine or ma….
Where the whole fish — backbone removal for grilling (spatchcock fish) lives on the source. Applied to medium-to-large round fish: sea bass (Dicentrarchus labrax), red snapper, branzino, sea bream (Sparus aurata), tilapia, whole trout, striped bass, gilt-head bream, and larger sardine or ma….
Whole Fish — Backbone Removal for Grilling (Spatchcock Fish) prepared the canonical way — Mahi sabzi (Persian herb-stuffed butterflied fish over charcoal, New Year Nowruz tradition). Scale the fish and remove gills; leave the head and tail on.
Whole Fish — Backbone Removal for Grilling (Spatchcock Fish) prepared the canonical way — Mahi sabzi (Persian herb-stuffed butterflied fish over charcoal, New Year Nowruz tradition). Scale the fish and remove gills; leave the head and tail on.

Where it comes from

Applied to medium-to-large round fish: sea bass (Dicentrarchus labrax), red snapper, branzino, sea bream (Sparus aurata), tilapia, whole trout, striped bass, gilt-head bream, and larger sardine or mackerel. The fish must have a distinct lateral muscle mass on each side of a separable backbone.

Lies perfectly flat on the grill, eliminating the curved-fish-rounding problemCooks in roughly half the time of a whole round fishSkin on both exterior surfaces crisps evenlyRetains head and tail for presentation — clearly identifies as a whole fishInterior cavity is open, allowing marinade or herb stuffing to contact the flesh directly

Best for

Grilling over charcoal (direct high heat)Plancha or flat-top grillingRoasting in a very hot oven (230 °C / 450 °F) on a flat trayWood-fired or live-fire cooking

How to cook it

  1. 1Scale the fish and remove gills; leave the head and tail on.
  2. 2BELLY METHOD (Persian / Latin American): Make a deep incision along the entire length of the belly. Spread the two sides open; reach in and cut along both sides of the backbone with scissors or the tip of a boning knife; snip the backbone at the tail and the head junction, then lift it out in one piece. The fish now opens like a book.
  3. 3BACK METHOD (Japanese / Levantine alternative): Insert the knife along the dorsal side of the backbone and cut the flesh away on one side, then repeat on the other, without cutting through the belly skin — similar to butterflying from the top.
  4. 4Pat the opened fish thoroughly dry; score the flesh on each side with 3–4 diagonal slashes about 1 cm deep (prevents curling at the edges and promotes even cooking).
  5. 5Rub with oil, salt, and the marinade or spice paste appropriate to the preparation — advieh, chermoula, achiote, or simply olive oil, garlic, and lemon.
  6. 6Rest flesh-side down on a hot, oiled grill for 5–7 minutes (for a 600 g fish) until the flesh releases naturally; turn and cook skin-side for 3–4 minutes. The fish is done when the thickest part of the flesh flakes cleanly from the pin bones (internal 60–63 °C).

Prep & butchery

  • Keep the fish on ice until immediately before butterflying; cold flesh is firmer and easier to debone cleanly.
  • Use sturdy kitchen scissors alongside the boning knife — for snipping the backbone at the head and tail ends nothing is better.
  • Remove all rib cage bones after the backbone: grip each rib with a finger and thumb and pull towards the head end along the line they grew.
  • Dry the opened fish in the refrigerator, uncovered, for 30–60 minutes before grilling if possible — dry skin is the key to non-stick crisp results.
  • Oil the grill grates generously and pre-heat until smoking before placing the fish.

Substitutes

  • Whole trout (butterfly-filleted)

    Smaller; 3–4 min per side suffices; excellent for the belly-entry method

  • Whole red snapper

    Thicker bone structure — use kitchen scissors to cut the backbone free; needs 8–10 min per side

  • Tilapia, butterflied

    Widely available and inexpensive; firm white flesh holds together on the grill well

Related cuts

Appears in

Mahi sabzi (Persian herb-stuffed butterflied fish over charcoal, New Year Nowruz tradition)Pescado tatemado (Mexican charred spatchcocked snapper over wood fire)Samak mashwi (Levantine whole fish on coals with chermoula or charmoula)Pla pao (Thai salt-crusted grilled whole fish, butterflied for market stalls)Branzino al sale (Italian salt-baked whole fish — not flat, but deboned similarly pre-bake)Dorade royale grillée (French whole gilt-head bream on charcoal, Provençal style)

References

  1. 1.The Professional Chef, 9th ed. — The Culinary Institute of America (2011)
  2. 2.Fish & Shellfish — James Peterson (1996)
  3. 3.Zaitoun: Recipes from the Palestinian Kitchen — Yasmin Khan (2018)
  4. 4.Plenty More — Yotam Ottolenghi (2014)
  5. 5.My Iran: Six Families, One Country — Claudia Roden cited in The Food of Iran — Shirin Simmons (2000)

Confidence: high

Notes

Persian New Year tradition

In Iran, Nowruz (Persian New Year) dinner centres on mahi (fish) grilled over wood or charcoal. The fish — typically Caspian kutum or local white fish — is butterflied through the belly, stuffed with a herb paste of garlic, fresh coriander, fenugreek, and dried sour plum (aloo), then grilled flat. The technique is ancient and unchanged; the flat configuration ensures the herb-stuffed cavity chars slightly at the edges while the thick dorsal flesh stays succulent.

Belly vs back entry

The belly entry is faster and leaves the dorsal skin fully intact — important when you want the fish to hold together when turned. Back entry preserves the belly presentation (useful for market display) but is more technically demanding. For a first attempt, belly entry is recommended.