Description
This brown algae growsin a round or fan-like shape and has a smooth top and a felt-like underside. The appearance changes with age and the fringe of hairs may disappear in time, it will get darker in colour and the margin will be more ruffled.
Size
The leaf can grow up to a size of 5 to 15 cm.

Colour
Varying in colour from olive to dark brown or black.

Habitat
Sublittorally from shallow water to about 20 m depth.

Distribution
North East Atlantic, Mediterranean and Adriatic Sea.