Aspect: Flat semi-circular blades (leaves), colour ranging from green to light brown to yellow. Grow flat and spread over relatively wide surfaces, leaves overlapping one another. Population: Widespread. Notable feature: Belongs to the Brown Algae category in spite of its predominent green colour (algae are subdivided into four colours: Brown, Green, Red and Blue-Green. Environment: Grows over small flatfish surfaces at the foot of rockky formations. Behaviour: -