Narrow, compressed, cartilaginous, bright scarlet fronds, to 300 mm long, tufted, much divided. Branching irregularly alternate, pinnules alternately secund in twos to fives, with acute apices, lowest of each set a simple spur, others increasingly strongly pectinate.
Temperate seas throughout the world; found on coasts of strong to moderate wave action and known from depths of 2-26 m (Womersley 1994: 389). Growing on Laminaria hyperborea stipes and on other larger algae; mainly subtidal, abundant, widely distributed, often washed ashore in quantity.
Text source: Algaebase