page_title: Codium fragile
section_title: Codium fragile subsp. atlanticum
hierarchical_section_title: Codium fragile / Subspecies / Codium fragile subsp. atlanticum
caption_attribution_description: Français&#160;: Codium fragile (Suringar) Hariot, 1889 - Banyuls-sur-Mer&#160;: 08/84
context_page_description: Codium fragile, known commonly as green sea fingers, dead man's fingers, felty fingers, forked felt-alga, stag seaweed, sponge seaweed, green sponge, green fleece, and oyster thief, is a species of seaweed in the family Codiaceae. It originates in the Pacific Ocean near Japan and has become an invasive species on the coasts of the Northern Atlantic Ocean.
context_section_description: This subspecies can be distinguished by the mucron or tip of the utricles. In this subspecies the mucron is short, no more than 20 µm long.
  Codium fragile subsp. atlanticum is known to have arrived in the southwest of Ireland around 1808. From there it may have spread by rafting or floating in the sea. Approximately 30 years later, it was found in Scotland. It is thought to have originally come from the Pacific Ocean near Japan.
  Since 1840, when it was first discovered in Scotland, it has spread the entire length of Britain, including Shetland. Between 1949 and 1955 it is known to have spread between Berwick-upon-Tweed and St. Andrews, Fife, a distance of 80 km. Populations of this algae occur mostly in northern Britain. Elsewhere in Europe it is found in several places, including Norway, the Netherlands, France, Spain and the Azores.
  This species displaces the native Codium tomentosum.
  Codium fragile subsp. atlanticum is used as food in the Far East.
caption: Close-up
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