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Red alga whose thallus is composed of fine filaments, gray rose jointed, brittle ends ends , a top ten centimeters. Each filament consists of a row of cells surrounded by axial place to place, at the nodes, of smaller cells (cortication) and a crown of thorns, the internodes are colorless.
Algae inhabiting rocks and bottoms of lower mediolittoral in the Atlantic and Mediterranean. It is also often attached to other algae.