Marine floras contain more than 4000 polyphenolic compounds, including phlorotannins, flavonoids, anthocyanidins,
lignin, tannins, catechin, epicatechin, epigallocatechin and hydroxylated polybrominated diphenyl ethers. Massive
investigations have been carried out on marine polyphenols, and a great number of methods have been developed for
the analyses of marine polyphenols, which possess an array of biological activities such as antioxidant, anticancer, antiinflammation,
anti-diabetic, and anti-allergic. This review focuses on progress in chemical diversity, analytical methods
and biological activities of marine polyphenols.