Cultured Aquatic Species Information Programme - Laminaria japonica

Thallus consisting of root-like holdfast, short stipe and blade. Blade long-belt shaped, up toone meter long, 10-20 cm broad, with margin undulate and overlapping, thick at the middleand thin at the margin. A short and small stipe and holdfast at the base of the blade. Holdfaststurdy (presenting haptera) with which the algae is fixed to rocky substratum.Colour: thickdark green; blade surface brown, occasionally glaucescent.