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Fucus spiralis

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Domain  Eukaryota
Order  Fucales
Genus  Fucus
Higher classification  Fucus
Superphylum  Heterokonta
Family  Fucaceae
Scientific name  Fucus spiralis
Rank  Species
Fucus spiralis wwwmarlinacukassetsimagesmarlinspeciesweb
Similar  Fucus, Fucus serratus, Pelvetia canaliculata, Brown algae, Bladder wrack

Fucus spiralis is a species of seaweed, a brown alga (Heterokontophyta, Phaeophyceae), living on the littoral shore of the Atlantic coasts of Europe and North America. It has the common names of spiral wrack and flat wrack.


Fucus spiralis Seaweedie Information on marine algae


Fucus spiralis Seaweedie Information on marine algae

Fucus spiralis is olive brown in colour and similar to Fucus vesiculosus and Fucus serratus. It grows to about 30 cm long and branches somewhat irregularly dichotomous and is attached, generally to rock, by a discoid holdfast. The flattened blade has a distinct mid-rib and is usually spirally twisted without a serrated edge, as in Fucus serratus, and it does not show air-vesicles, as Fucus vesiculosus.

Life history

Fucus spiralis MarLIN The Marine Life Information Network Spiral wrack Fucus

The reproductive bodies form rounded swollen tips on the branches, usually in pairs. In the conceptacles oƶgonia and antheridia are produced after meiosis and then released. Fertilisation follows and the zygote develops directly into the diploid sporophyte plant.


Fucus spiralis MarLIN The Marine Life Information Network Spiral wrack Fucus

The other common species of Fucus on the coasts of British Isles: Fucus spiralis, Fucus vesiculosus and Fucus serratus along with Ascophyllum nodosum form the main and dominant seaweeds on rocky shores. These three species, along with two others Pelvetia canaliculata and Ascophyllum nodosum form the zones along the shore.


Fucus spiralis Fucus spiralis images of British biodiversity

F. spiralis is common on the coasts all around the British Isles, western coasts of Europe, Canary Islands and North-eastern America.


F. spiralis produces phlorotannins of both the fucol and fucophlorethol types.

Fucus spiralis Fucus spiralis Wikipedia


Fucus spiralis Wikipedia

Similar Topics
Brown algae
Fucus serratus