There are twenty five species of sea cucumbers in the waters off Phu Quoc and eleven of these species are edible. The most famous sea cucumber dish found in Phu Quoc Island is the sea cucumber soup.

Sea cucumbers have a distinct oceanic flavor that marries well with strong-tasting ingredients like chiles, fish sauce, and garlic.
How sea cucumbers are processed
Once the fishermen have caught sea cucumbers, they are immediately processed at sea or near the port. The sea cucumbers are squeezed to force the ejection of the guts and water, or a small cut is made. They then washed in seawater and either sold to restaurants immediately or boiled and left in the sun for some days to dry them out.
Where to buy
Due to the increase demand of sea cucumbers in China, majority of the sea cucumbers are exported and finding a restaurant that serves this soup is relatively difficult. It is considered a “luxury food” product that has high nutritional value and also medicinal value. If you want to try this soup, the best place to find it is in An Thoi Town. The cost for a bowl of soup is 70,000VND.
Besides the soup, there are a variety of other dishes made with sea cucumbers that you can try, such has baked sea Cucumber in aluminum foil, sea cucumber salad, sea cucumber braised with beef tendon, sea cucumber porridge, and braised Sea Cucumber with oyster sauce.
A special kind of sea cucumber – the ball sea cucumber
Ball Sea Cucumber (Banh Long or “fury ball”) is new in demand sea animal that is being much sought after here in Phu Quoc thanks to an increase in Chinese demand for this mysterious bottom dwelling creature. The Chinese claim that this species of sea cucumber has magical healing properties and are willing to offer top dollar for the creature. For you science enthusiasts, this species belongs to Dendrochirotida an order of sea cucumbers from the Holothuroidea class characterized by ten to thirty tentacles. The ball cucumber belongs to the Echinoderms phylum due to its radial symmetry.
How to prepare ball sea cucumber:
When the ball sea cucumber is caught, it is cleaned and then covered in salt, then boiled in water, and left to be dried. It is then sold in its dry state. To cook it, you soak it in water for 3 to 4 days, then boil it, slice it, and serve it with other ingredients like mushrooms and pork.