Flustra foliacea (Linnaeus, 1758) is a cheilostome marine bryozoan that is commonly found along the strand line, or high-tide mark, around the British coast especially after storms.
It has a distinctive lemon-like smell when fresh.
Known as the broad-leaved hornwrack, this bryozoan forms bushy flexible colonies 6–20cm in height, that are light grey-brown in colour.
It is often mistaken for a seaweed.
Bryozoans consist of individuals called zooids that form a colony. Find out how you can identify Flustra foliacea colonies.
This bryozoan is found in cold water areas on stony ground and forms a rich microhabitat for other animals. Find out more.
Flustra can grow for at least 12 years and forms annual growth lines, similar to rings in a tree.
Get reference material for Flustra foliacea.
Base of Flustra where it adheres to substrate.
© Natural History Museum, LondonFlustra foliacea fronds.
© Natural History Museum, LondonElectra pilosa encrusting Flustra foliacea.
© Natural History Museum, LondonFlustra foliacea habitat.
© Dorset SeasearchOriginal description of Flustra foliacea from Linnaeus, 1758.
© Natural History Museum, LondonR Hooke's Micrographia.
© Natural History Museum, LondonR Hooke's microscope.
© Natural History Museum, LondonStructure of Flustra foliacea.
© Natural History Museum, LondonSenior Curator (Bryozoa) on the Invertebrates Curation Team. Research focuses on the history and biodiversity of marine bryozoans and the preservation, maintenance and conservation of invertebrate collections.