A Quang Ninh Specialty With a Frightening Appearance But An Unforgettable Flavor

Although black sea cucumber may appear unattractive at first glance, this natural marine product is beloved by both local residents of Quang Ninh Province and discerning food lovers because of its crunchy texture, distinct flavor, and versatility in cooking.

Black Sea Cucumber – Odd Appearance, Highly Sought After

What the local people call the Black Sea Cucumber (also known by names such as don dot, sea leech, or sea cucumber) is one of the rare and precious natural products found along the coastline of Quang Ninh. Because it can only be harvested from the wild ocean environment, many people consider it a gift given by nature to the local marine ecosystem.

Black sea cucumber is a gift given by nature

According to local fishermen, the Black Sea Cucumber prefers to live on the seabed in deeper, clean waters where there are rocky coral outcrops, sandy mud, or reef areas. Occasionally, when strong waves push them inshore, they are found in shallower sandy areas, hiding quietly in rock crevices or under stones.

In biological terms, the Black Sea Cucumber is an invertebrate marine animal with a long body and rough, dark-colored skin. These creatures can be found in many coastal areas of Quang Ninh, including the waters off Quan Lan Island and the Van Don Archipelago.

At first sight, their rugged, black, slightly slimy outer surface seems uninviting. However, once properly prepared, this unusual ingredient can be transformed into a variety of delicious dishes that are treasured by both locals and visitors.

Seasonality and Harvesting

Ms. Tracy Nguyen, who operates a seafood supply business in the Van Don Special Administrative and Economic Zone, explains that Black Sea Cucumbers can be harvested year-round. However, the peak season when the creatures are most flavorful and of the highest quality runs from December through March or April of the following year (solar calendar).

During this time, if the fisherman are fortunate, they can catch exceptionally large specimens weighing up to a kilogram or more.

According to Ms. Nguyen, although these sea cucumbers move quite slowly that makes them relatively easy to catch, it still takes a keen eye and diving experience to spot them. Skilled divers often notice the tiny air bubbles they shift as they emerge slightly from under rocks.

Frightening appearance makes some people scary

Processing and Preparation

After harvesting, the Black Sea Cucumbers are thoroughly cleaned and the internal organs are removed to preserve their freshness. Because of this careful preparation, the ones sold in marketplaces are usually already prepped, meaning buyers need only rinse them and blanch them a few times before cooking.

Fresh Black Sea Cucumber in Quang Ninh typically sells for approximately VND 300,000–500,000 per kilogram (about USD 12–20, depending on size and market conditions). In addition to fresh sales, some are processed into dried form to make storage easier, extend shelf life, and facilitate transportation to other provinces – meeting the demand of diners across Vietnam.

Local and Visitor Impressions

Helen Van, a visitor from Hanoi, once tried dishes made from Black Sea Cucumber in Quang Ninh. She described its texture as firm and pleasantly crisp, somewhat like pork stomach. When prepared skillfully, it loses any fishy smell and is not tough to eat.

“At first, seeing the Black Sea Cucumber made me shudder, I didn’t even want to touch it,” she admitted. “But once I tasted it, the flavor was completely different from what I expected. It surprised me. I’ve tried sea cucumbers in other regions like Khanh Hoa and An Giang, but Quang Ninh’s version from Van Don and Quan Lan really suits my palate.”

She adds that she occasionally orders some back home to prepare different dishes for her family, especially when they want to change up their regular meals.

In Quang Ninh, Black Sea Cucumber is also a dish commonly present at weddings and festive banquets, a testament to its status as a local culinary treasure.

Some attractive dishes are made in black sea cucumber

Tips for Buying and Cooking

Based on Helen’s experience, when selecting Black Sea Cucumbers:

• Choose ones with a natural, deep black color that is not dull or faded.

• The skin should feel elastic and firm to the touch.

Whether bought whole or pre-cleaned, the key step is to remove all internal grit and slime. For whole cucumbers, slit the body lengthwise, scoop out the organs, and rinse thoroughly. For pre-cleaned ones, rubbing with salt and rinsing repeatedly before blanching is recommended.

Properly prepared Black Sea Cucumber can be used in steamed soups, stir-fries with vegetables, or even congee, each method bringing out different aspects of its natural sweetness and texture.

Because the skin is fairly smooth and does not easily absorb seasonings, combining it with hearty ingredients in soups or stir-fries ensures the dish is flavorful  whether served with rice or enjoyed as part of a social meal.