A lavish Pacific-coast seafood soup combining seven types of seafood (the 'seven seas') — typically shrimp, fish, octopus, squid, clams, crab, and scallops — in a rich tomato-epazote broth. A specialty of Sinaloa and the Pacific coast, siete mares is a celebratory soup served at weddings, family gatherings, and special occasions. The number seven is symbolic, not prescriptive.
El siete mares ('seven seas') is a Pacific-coast Mexican seafood soup that takes its name from the symbolic number of seafood varieties it contains. The dish belongs to the broader tradition of Mexican seafood soups (caldo de mariscos), which run the length of both Mexican coasts. The siete mares specifically is most associated with Sinaloa and the northwest Pacific coast, where the abundant variety of Pacific seafood makes a seven-seafood combination feasible. The dish is a celebration food, served at special occasions, and reflects the richness of Mexico's Pacific fisheries.
A bowl of siete mares presents a deep red-orange, slightly thick broth filled with pieces of fish, whole shrimp, octopus tentacles, clams in the shell, crab legs, and rings of squid. The first sip is intensely seafood-savory — the broth has absorbed the essence of all seven varieties; the tomato adds brightness; the epazote adds a resinous, herbal note. Eaten with a spoon, with tostadas and lime, the seafood fished out bite by bite.
Siete mares' depth comes from the multi-seafood stock. Each seafood contributes different compounds to the broth: crustaceans (shrimp, crab) contribute glutamates (umami) and astaxanthin (red pigment); mollusks (clams) contribute briny minerals; fish contributes gelatin from its bones. The tomato base provides acidity (citric and malic acid) and the pigment lycopene. Each seafood is added at the right time — firm-fleshed fish first, then octopus and squid (which need longer cooking to tenderize), then shrimp and clams (which cook in minutes) — so none overcooks. Epazote adds its distinctive resinous aroma, a classic pairing with seafood in Mexican cooking.
Variations
The seven seafoods vary by catch and region; some versions use fish stock as the base; heat level varies.
On the Palate
Where Siete Mares sits in the Mexican flavor cloud
Ingredients
Serves 6
How it's made
6 steps · 1 hour active + 30 min waiting
- 130 min
Make a base broth: simmer fish bones and shrimp shells with onion, garlic, and tomato; strain.
- 210 min
Add diced tomato, onion, and epazote to the broth; simmer 10 minutes.
- 315 min
Add firm white fish chunks and octopus; simmer 15 minutes.
Watch outAdd the seafood by cooking time — firm fish and octopus first — the octopus and squid need the longer simmer to turn tender; drop them in with the quick-cooking shrimp and they'd stay rubbery.
- 410 min
Add shrimp, cleaned squid rings, and clams; simmer 8-10 minutes until shrimp is pink and clams open.
Watch outAdd the shrimp and clams last, just 8–10 minutes — pull them the moment the shrimp turn pink and the clams open; any longer and they toughen.
- 55 min
Add crab legs in the last 5 minutes; season with salt and lime juice.
- 61 min
Serve in deep bowls with tostadas, lime wedges, and a splash of hot sauce.
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