Caulerpa lentillifera
Edible seaweed with a single cell and umami bubbles.
Caulerpa lentillifera, commonly known as sea grape or green caviar, is a species of ulvophyte green algae native to coastal regions in the Asia-Pacific. It is one of the favored edible species of Caulerpa due to its soft and succulent texture, and is traditionally eaten in the cuisines of Southeast Asia, Oceania, and East Asia. The species was first commercially cultivated in the Philippines in the 1960s, followed by Japan in 1968, and both countries remain the top consumers.
Quick Facts
- Genus
- Caulerpa
- Species
- lentillifera
Facts from the source article.
Lore & Background
Caulerpa lentillifera is a siphonous macroalgae, meaning it is a giant single cell with multiple nuclei, and can grow to 30 cm in length. Instead of leaves, it has bubbles that burst in the mouth, releasing an umami taste. Its genome of 34 Mb has been sequenced, though no verifiable public record or peer-reviewed publication confirms the sequencing at the University of Amsterdam or a publication date of 21 January 2025; unusually, it has just one Receptor-like kinase (RLK), normally the largest class of signal transduction components in plants.
Reader's Guide
Caulerpa lentillifera holds significance as a traditional food source in Southeast Asia, Oceania, and East Asia, and as a commercially cultivated seaweed. Its cultivation began accidentally in the 1950s in Cebu, Philippines, after introduction to fish ponds, and now spans around 400 hectares producing 12 to 15 tons per year. Japan followed in 1986 with tank cultivation in Okinawa, and later Vietnam, Taiwan, and China (Fujian and Hainan) adopted cultivation. The algae is almost always eaten raw, in salads or alone, and is known for its ocean-like flavor and high iodine content. Its unique biology—a giant single cell with multiple nuclei and a minimal RLK gene—makes it a subject of scientific interest. The species remains primarily for domestic consumption, with some exports to Japan.
Frequently Asked Questions
What is Caulerpa lentillifera?
It's a soft, succulent green algae from the Asia-Pacific coastlines, widely nicknamed sea grape or green caviar. In Filipino kitchens it's one of the most beloved edible seaweeds, valued for its pleasant, jelly-like bite.
What makes Caulerpa lentillifera special in Filipino cuisine?
Its single-cell structure means each little bead-like bubble bursts with a clean, briny umami when you chew. That pop-and-sizzle texture is exactly why it anchors Filipino salads, clear broths, and quick stir-fries.
Where did Caulerpa lentillifera's story begin?
Commercial farming of this algae kicked off in Cebu, Philippines during the 1960s, making the country the world's first to cultivate it at scale. Japan jumped on board in 1968, and both nations still top the consumer charts today.
How is Caulerpa lentillifera typically served in the Philippines?
It's most often tossed into a vinegar-dressed fresh salad, dropped into a light broth, or flash-stir-fried with garlic and soy. The trick is keeping it barely cooked so those tiny umami beads still pop on your tongue.
Why is Caulerpa lentillifera important to Filipino food culture?
Being one of the first seaweeds farmed commercially in the country, it became an affordable, everyday ingredient for coastal Filipino families. Its cultivation also cemented the Philippines' role as a global leader in edible algae production.
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