Niall Benvie / Twisted wrack seaweed {Fucus spiralis} Scotland, UK

Niall Benvie / Twisted wrack seaweed drying out on shore {Fucus spiralis} Scotland, UK

Niall Benvie / Twisted wrack (Fucus vesiculosus). Loch Carron, Scotland, UK, Europe

Duncan Mcewan / Exposed seaweed on rocky shore, twisted wrack {Fucus spiralis} fertile fronds Arisaig, Argyll, Scotland, UK

Duncan Mcewan / Twisted wrack seaweed {Fucus spiralis} Outer Hebrides, Scotland, UK

Niall Benvie / Twisted wrack {Fucus spiralis} Bladder wrack {F vesiculosus} seaweeds. Scotland UK

Alex Mustard / Bed of Spiral wrack (Fucus spiralis) growing in shallow water reflecting in the surface, Loch Carron, Highlands, Scotland, UK.

Adrian Davies / Spiral Wrack (Fucus spiralis) Devon, UK. August.

Alex Mustard / Detail of the fronds of Spiral wrack (Fucus spiralis). Mylor, Falmouth, Cornwall, England, United Kingdom. North East Atlantic Ocean.

Alex Mustard / Spiral wrack (Fucus spiralis) with fruiting bodies photographed in a rock pool, with common periwinkle (Littorina littorea). Looe, Cornwall, England, United Kingdom. English Channel, North East Atlant...

Alex Mustard / Dense growth of spiral seaweed (Fucus spiralis) with fruiting bodies at tips of fronds. Looe, Cornwall, England, United Kingdom. English Channel, North East Atlantic.

Philippe Clement / Gutweed (Ulva intestinalis / Enteromorpha intestinalis), sea lettuce (Ulva lactuca) and spiral wrack / flat wrack (Fucus spiralis) washed on beach, Normandy, France, June