Discover fascinating facts about the 'blue caviar' of the Vietnamese sea.

Sea grapes (Caulerpa lentillifera) are a well-known type of seaweed found in tropical regions of Southeast Asia and the Pacific. In Vietnam, sea grapes are becoming increasingly popular in salads, sushi, and seafood dishes due to their unique shape and distinctive texture. When placed in the mouth, the tiny "grains" crackle and pop like fish roe, creating an experience many people will remember.

Photo: seaweedvietnam.wordpress.

Interestingly, the entire "grape cluster" is actually just one giant, single-celled organism. Despite appearing to have many separate parts, sea grapes are not composed of countless cells like typical plants. They are one of the most surprisingly large single-celled organisms in the natural world . The horizontal, creeping body under the water sprouts small branches bearing small, round, turquoise seeds, making the whole cluster look like a tiny bunch of grapes.

Photo: Kilala.

Sea grapes thrive in shallow, warm, and clear waters. They typically grow on sandy or coral reefs where sunlight can easily penetrate. In Japan, especially in Okinawa, sea grapes are considered a famous delicacy and are known by the poetic name "umibudo"—meaning "grapes of the sea." Japanese people often eat fresh sea grapes with soy sauce or light vinegar to preserve their natural crispness.

Photo: nhathuoclongchau.com.

Besides its unusual appearance, sea grapes attract attention due to their relatively high mineral and fiber content. They contain iodine, magnesium, and many natural compounds from the marine environment. Therefore, sea grapes often appear in modern diets aimed at low-calorie, mineral-rich foods. However, like many other types of seaweed, consumption should be balanced to avoid absorbing too much iodine.

Another interesting fact is that sea grapes are quite fragile after harvesting. If soaked incorrectly or exposed to unsuitable temperatures, the round grains will quickly shrink. Therefore, preserving fresh sea grapes requires careful techniques to maintain their characteristic crispness.

Today, sea grapes are not just a food but have become a symbol of modern seafood cuisine . With their eye-catching emerald green color and jewel-like shape, they often appear in high-end food photos across social media. But behind that "luxurious" appearance lies a humble type of seaweed that has been used by coastal residents of Asia for centuries.

Among the countless bizarre creatures of the ocean, sea grapes are proof that nature sometimes creates gifts that are both beautiful and delicious in unexpected ways.

Source: https://khoahocdoisong.vn/kham-pha-su-that-hap-dan-ve-trung-ca-xanh-cua-bien-viet-nam-post2149100100.html