Return to main search page

Devil's Tongue Weed, Grateloupia turuturu


Short description of Grateloupia turuturu, Devil's Tongue Weed

A large red seaweed; deep red to purple in colour, sometimes bleaching to light brown in summer.  One to six elongated, lance-shaped blades up to 15 cm in width and 1m in length arise from a disc holdfast via a short stipe.  The plant is thick and firm with a mucilaginous texture which is slippery to touch.  Also occurs as a crustose form.

Description of Grateloupia turuturu, Devil's Tongue Weed status in GB

Devil’s tongue weed occurs along the southeast coast of England and in Pembrokeshire.

Habitat summary: Grateloupia turuturu, Devil's Tongue Weed

Devil’s tongue weed grows in sheltered areas including harbours and bays, attached to pontoons, harbour walls, shells and stones. It occurs on the lower shore in pools, and subtidally to 7m.  Due to its tolerance of low salinities it may be found in estuarine areas as well as fully marine waters.

Overview table

Environment: Marine
Species status: Non-Native
Native range: Eastern Asia
Functional type: Algae (macroalgae)
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: Southsea
Date of first record: 1973

Distribution map

Map of the UK with areas shaded to show the UK distribution of Devil's Tongue Weed

GB Distribution from NBN Atlas

Author's name:

Natalie Sweet

Last updated:

October 2nd 2019

We try to keep these factsheets up to date, however if you notice any issues please contact us

[You must enable JavaScript to see this email address]

Thin strip of image show tree trunk and bark