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Fucus vesiculosusMid-shore wrack easily recognised by its paired bladders occurri on either side of a prominent midrib. The frond is generally not stly spiralled and the receptacles do not have a sterile rim (a href= Fucus_spiralis.php Fucus spiralis/a and a href= Fucus_guiryi.php F. guiryi/a), and the frond does not have a serrated margin (a href= Fucus_serratus.php Fucus serratus/a). Fucus vesiculosus is attached by a small, stly attached disc which gives rise to a short stipe. The reproductive receptacles are swollen area at the tips of fronds that have many flask-shaped cavities called conceptacles. These house the male and female reproductive structures known as antheridia (borne on antheridiophores) and oogonia (containi 8 eggs), respectively. The eggs and sperm are liberated onto the surface of the receptacles and a pheromone (sex-attracti substance) is released by the eggs that attracts the sperm. Fertilization results in a zygote that forms a new Fucus adult. bDistributionThis species is common in the North Atlantic south to the C
Location/common name:- Bladderwrack black tang black tany bladder fucus dyers fucus fucus tips fucus vésiculeux gThis species is common in the North Atlantic south to the Canary Islands. A bladderless form occurs on more wave-exposed shores in the NE Atlantic (last picture below). bUsageFucus vesiculosus is used in cosmetic preparations and in thalassotherapy. lower mid-littoral
Usesvesiculosus is used in cosmetic preparations and in thalassotherapy.