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
Distribution: Common through Britain and Ireland.
Similar species: Ulva (Enteromorpha) compressa which is generally compressed.