Most seaweed from Sulawesi leaves the islands dried, in sacks, on its way to become an ingredient. Sea grapes are the opposite: a green seaweed eaten fresh, prized for texture rather than for anything extracted from it. That makes them an interesting product with a hard constraint. Their value depends on arriving intact and crisp, and they do not keep for long.
What sea grapes are
Sea grapes are Caulerpa lentillifera, a green seaweed with upright stems covered in small, round, bead-like branchlets. The beads burst gently when bitten, giving a light, salty pop that is the whole point of the food. In South Sulawesi they are called lawi-lawi. Elsewhere in Asia they are known under other local names, including umi-budo in Okinawa, where they have long been a regional speciality.
Botanically, sea grapes have little in common with the red seaweeds that dominate Sulawesi’s trade. They are not a source of carrageenan or agar, and they are sold by freshness and appearance rather than by laboratory yield. The Caulerpa genus includes many species; only those with an established history as food, such as C. lentillifera and a few relatives, should be traded for eating.
How they are eaten in Sulawesi
Around Makassar and along the coasts of South Sulawesi, lawi-lawi are commonly eaten raw as a side dish or salad, often with a sour or spicy dressing and sometimes with grated coconut. They appear at home meals and in coastal eateries, and are part of the everyday seaweed eating that our article on seaweed as everyday food describes. Because they are served uncooked, clean growing water and careful handling are food safety matters, not just quality ones.
Why handling decides everything
Sea grapes are living tissue when they are sold, and they are sensitive. The main risks along the chain are:
- Physical damage: the beads fall off or burst if the stems are crushed or packed too tightly.
- Freshwater: rinsing in freshwater or exposure to rain can damage the tissue; handlers generally wash them in clean seawater.
- Cold: sea grapes are sensitive to low temperatures and tend to shrivel in an ordinary refrigerator, so they are usually kept cool rather than chilled.
- Drying out: left exposed to air, they lose their crispness quickly.
- Time: even well-handled fresh sea grapes have a short shelf life, measured in days rather than weeks.
To reach more distant buyers, some producers in other countries sell sea grapes salted or partly dehydrated, to be refreshed in water before serving. These forms travel better, though the texture is not identical to fresh.
Niche markets and their limits
Interest in sea grapes has grown in restaurant and specialty food markets, especially where Japanese and Southeast Asian cuisines are popular. For producers, this is an opportunity with clear limits. Fresh product needs fast, reliable transport and cool-chain handling that is difficult from remote coasts. Food safety expectations for a product eaten raw are high, and import rules for fresh seaweed vary by country. Volumes are small compared with the dried red seaweed trade.
For coastal communities, sea grapes can still be a useful additional income alongside other seaweed, in the way discussed in our article on seaweed and coastal livelihoods in South Sulawesi. Like other seaweeds, they grow without feed or fertiliser, though pond or shallow-water production still needs careful site management; see seaweed as a low-input crop.
Frequently asked questions
Are sea grapes the same as sea grass?
No. Sea grapes are a seaweed, an alga. Seagrasses are flowering plants that grow in shallow coastal waters. The two are sometimes confused in everyday language.
Can sea grapes be frozen?
Freezing generally destroys the texture that makes them valuable. Salted or partly dehydrated forms are the usual way to extend shelf life.
Should imported sea grapes be treated like any other fresh produce?
In terms of care, broadly yes, and in terms of rules, check with the importing country. Because they are eaten raw, buyers should ask where they were grown or gathered and how they were washed and packed.
Working with Kospermindo
Kospermindo is a cooperative based in Makassar that has supported seaweed farmer groups in South and Central Sulawesi since 2002. To ask about Sulawesi seaweeds, please contact us.