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Sea Lettuce

HomeMarine Algae & SeagrassSea Lettuce

Sea Lettuce

Ulva lactuca

Sea Lettuce is one of the easiest seaweeds to recognise, with its bright green, translucent fronds. It can thrive in high-nutrient conditions, sometimes forming large blooms. On Lihou, look for sheets of sea lettuce draped over rocks at low tide or floating in pools.

  • Habitat: Upper to mid-shore
  • When to See: Prolific in warm months.
  • Length: Thin, sheet-like fronds up to 30 cm