Twisted Wrack

Fucus spiralis


Twisted or 'Spiral' Wrack is a common 'wrack' seaweed that grows just below the high water mark on rocky shores. Living on the upper shore, it is very tolerant of desiccation and can survive out of the water for long periods, although not as long as Channelled Wrack. It can live for up to four years.

How to identify

Twisted Wrack is a pale olive-brown 'wrack' seaweed, recognised by the spirally twisting fronds with an obvious rib down the middle, and the yellowish, paired swollen tips which are the reproductive structures.

Where to find it

Common on rocky shores all around our coasts.


When to find it

  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December

How can people help

Seaweeds provide a vital link in the food chain for many of our rarer species. Our seas and coastline are in need of protection if we are to keep our marine wildlife healthy. The Wildlife Trusts are working with fishermen, researchers, politicians and local people towards a vision of 'Living Seas', where marine wildlife thrives. This work has recently had a massive boost with the passing of the Marine Bill, promising sustainable development of the UK's marine environment. Do your bit for our Living Seas by supporting your local Wildlife Trust.

Species information

Common name
Twisted Wrack
Latin name
Fucus spiralis
Seaweeds and grasses
Length: up to 40cm
Conservation status