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Ulva intestinalis Linnaeus

Also known as Enteromorpha intestinalis
Description: Inflated, hollow fronds with a bright grass-green colour, strongly resembling the large instestines of mammals.
Habitat: Rock pools in the upper intertidal and salt-marshes, particularly in places where  there is extensive freshwater runoff from the land.
Distribution: Common through Britain and Ireland, and the NE Atlantic in general.
Similar species: Ulva (Enteromorpha) compressa which is generally compressed.

Species list

Ulva compressa

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