Ecklonia cava

Ecklonia cava (or paddle weed, kajime (搗布/未滑海藻), noro-kajime), is an edible marine brown alga species found in the ocean off Japan and Korea.

It is used as an herbal remedy in the form of an extract called Seanol, a polyphenolic extract, and Ventol, a phlorotannin-rich natural agent. Phlorotannins, such as fucodiphlorethol G, 7-phloro eckol, 6,6'-bieckol, eckol, 8,8'-bieckol, 8,4"'-dieckol and phlorofucofuroeckol A can be isolated from Ecklonia cava. Other components are common sterol derivatives (fucosterol, ergosterol and cholesterol).

It is also identified as a viable colloid source for use in the biotech industry.