Biopolymer rheology is an appealing subject of both academic and practical interest since it deals with materials and properties that are not only industrially important, but are essential for any living systems. In particular, polysaccharides hold a wide range of different functions, from the generation of solid structures or tough fibers in higher plants to the formation of hydrated crosslinked three-dimensional networks in marine seaweeds and to the government of the solution properties of physiological fluids.