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Udotea are often colonised by many other species such as coralline algae, tube worms and hydroids.
Its fan-shaped fronds on a thin peduncle often have serrated edges. The algae are olive green and measure about 10cm and can be kept in an aquarium. This species prefers shady, rocky bottoms between the surface and 120m deep. It is found all over the Mediterranean, and in the Atlantic from Cabo Verde to the Canary Islands.
Scientific name: Udotea petiolata