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Distribution in scandinavian waters
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Maximum length: 30 cm.
Appearance: The almost ball shaped receptacles (reproductive
organs) have a noticable edging. The leaf-like lobes usually have a
nerve in the middle and are devoid of air filled bladders. Its colour
varies from yellow-green to dark brown. Spiral wrack can closely resemble
bladder wrack and
arctic
wrack (Fucus evanescens = Fucus distichus = Fucus
inflatus)
Depth: Spiral wrack is found from mean
water and a little bit up on the beach. Found often above other
"leafy" seaweed.
Environment: Found on rocks
and cliffs but does not thrive in rock
pools.
Misc: Eggs and sperm are produced on the same individual. In
the picture above, a brown fluff is visible, this is a thread-like brown
algae, and a periwinkle.
Classification: Spiral wrack is a member of the brown algae group.
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