Among the countless seafood specialties that make Phú Quốc a culinary paradise, the cactus-spined murex stands out as a truly unique treat. Locals often call it ốc gai xương rồng because of the sharp spikes covering its shell, resembling a tiny sea version of a cactus. Though small and humble, this mollusk delivers a surprising depth of flavor that earns the love of both locals and seasoned seafood lovers.
What Makes This Spiky Little Shellfish So Special?
Cactus-spined murex is considered a rare species, found predominantly in the southwestern waters of Phú Quốc—an area rich in rocky reefs and ideal habitats for this spiny snail.
In Vietnam, two species are commonly encountered:
- Murex trapa – the more common type, with shorter and fewer spines (rare-spined murex)
- Murex trocheli – less common, with long sharp spines (Troschel’s murex)
Both belong to the Murex genus, Muricidae family, known worldwide for their striking shells and flavorful meat. Globally, these species are found mainly in the Western Pacific, from Southeast Asia up to Northeast Asia.
A Humble Gift from the Sea
Although inexpensive and often caught accidentally in mixed nets, the cactus-spined murex is regarded locally as a small but meaningful delicacy. Islanders consider it a special treat to serve when welcoming friends from afar.
Outside Phú Quốc, they can also be found in Vũng Tàu—especially around Rạch Bà Bridge on 30/4 Street where fishing boats unload fresh produce each afternoon—and in Cần Giờ’s Hàng Dương Market, where vendors cook them on the spot for visitors.
The Best Ways to Enjoy Cactus-Spined Murex
This shellfish doesn’t need complicated cooking methods. Islanders believe there are only two ways to enjoy it at its best:
- Charcoal-grilled murex
- Steamed murex with lemongrass
When grilled over glowing charcoal, the shells darken while releasing a rich, smoky aroma. Inside, the meat turns milky white, plump, and firm, offering a perfect balance of sweetness, chewiness, and natural ocean brine—distinct from the flavors of clams, mussels, or “ốc mỡ.”
Dipping sauces are simple but essential:
- Lime salt and pepper
- Crushed sea salt with bird’s-eye chili
- Green chili dipping sauce (a favorite among local women)
A Tiny Shell, A Big Flavor
It may not be as well-known as sea urchin or herring salad, but among seafood lovers in Phú Quốc and Vũng Tàu, the cactus-spined murex holds a special place. Small, rustic, affordable—yet rich in flavor and unmistakably tied to the character of the island.
If you ever visit Phú Quốc, be sure to enjoy a plate of grilled cactus-spined murex by a beachside charcoal stove. Pair it with a glass of sim wine, listen to the waves, and you’ll understand why locals call it a “little treasure of the sea.”
