Moon crab is one of the most unique and sought-after seafood specialties in Con Dao. Not only prized for its sweet, nutritious meat, this rare species is also valued for its beautiful shell, which can be crafted into exquisite souvenirs.
The moon crab (Carpilius maculatus) belongs to the family Carpiliidae. It is found across the Indian Ocean and the western Pacific, often living around coral reefs at depths of about 10 meters. In Vietnam, moon crab appears seasonally during the southern wind period, especially around Phu Quy Island (Binh Thuan) and Con Dao (Ba Ria – Vung Tau).
When fully grown, a moon crab measures around 18 cm with a thick, sturdy carapace. Its shell is decorated with bright red circular spots on a vivid pink background — resembling the glowing patterns of the moon. Thanks to this striking appearance, dried moon crab shells are often used to make decorative handicrafts for tourists.
According to Con Dao fishermen, moon crab tastes best during the full-moon period. While other crab species tend to become watery or lose flavor during this phase, moon crab remains firm, sweet, and exceptionally rich. They typically hide in coral crevices and rocky gaps around small offshore islets. To catch them, fishermen must dive at night and search along coral reefs, where the crab’s slow movement and distinctive markings make it easier to spot.
Moon crab meat is fragrant, sweet, and firm. It is packed with essential minerals such as zinc, copper, potassium, and iron. It also contains omega-3, healthy fats, and calcium — all highly beneficial for heart health. The protein content of moon crab in Con Dao is remarkably high, comparable to the premium emperor crab (cua huỳnh đế).
Moon crab can be prepared in many ways: steamed, boiled, grilled, stir-fried with tamarind, or cooked sweet-and-sour. However, the traditional Con Dao method is simple — steaming or grilling the crab and serving it with a dipping sauce of salt, pepper, lime, and chili. This rustic preparation highlights the crab’s natural sweetness and leaves a lasting impression on anyone who tastes it.
Beyond culinary uses, moon crab is also considered an offering in many Con Dao households during Lunar New Year and other sacred occasions, symbolizing elegance and abundance.
In recent years, the moon crab market in Con Dao has become increasingly competitive. Traders from Ho Chi Minh City, Dong Nai, and nearby provinces travel to the island to purchase moon crabs for luxury restaurants and five-star hotels. As a result, it has become more challenging for tourists to buy fresh, high-quality moon crab as gifts.
For the best experience, travelers should visit reputable local fishing villages, seafood markets, or trusted restaurants. Prices vary depending on size and season, but generally:
- Small moon crabs (under 300 g): around 300,000 VND/kg
- Large moon crabs: 400,000+ VND/kg
The ideal time to enjoy moon crab is during the full-moon period, when the meat is at its firmest and most flavorful.
Con Dao is truly a natural treasure of Vietnam, home to several rare seafood delicacies such as red lobster, “ốc vú nàng” (nipple snail), and moon crab. However, overharvesting poses a risk to these species. Sustainable management and conservation efforts are essential to protect these precious resources for future generations.
