Learning Zone

Northern sea fan - Swiftia pallida

Swiftia pallida

Image Anon. - A group of sea fans. Image width ca 30 cm.
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Distribution map

Swiftia pallida recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)

Why do the maps differ?

Sightings Have you seen Swiftia pallida?
If so please submit your record.

  • UK_BAP

Key identification features Key identification features

  • Small fan with few branches.
  • Up to 200mm high, usually 70 to 100 mm .
  • White/grey variety found in Scotland.

Habitat Habitat

  • Found on rocks and boulders from depths of 18-60 m.
  • Often found in groups.
  • Occurs in moderate tidal streams away from high wave action, for example at the mouths of sea lochs.
  • Present further south of the British Isles but only in very deep cold water.

Species facts Species facts

  • Pink variety recorded in Norway.
  • Population may decline in Scotland with warmer seas.
  • Host for the rare sea fan anemone, Amphianthus dohrnii.
  • Long lived and slow growing.

Want to read more?

Have a look at the intermediate review or the advanced review.

Sightings Have you seen a northern sea fan? If so please submit your record.