Description: Growing as a thin black crust, thick in some descriptions, growing directly on rock. Layered, without filaments.

Habitat: Very rare. Shaded rock pools in the lower intertidal.

Distribution: Recorded from scattered sites in the British Isles. Europe: Norway. Atlantic coast of North America: Virginia.

Similar Species: Ralfsia.

Distribution Map from NBN: Sphacelaria mirabilis at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Sphacelaria mirabilis at iNaturalist World Species Observations database.

GBIF data for Battersia mirabilis

WoRMS: Sphacelaria mirabilis at World Register of Marine Species. Accepted name: Battersia mirabilis Reinke ex Batters, 1890. AphiaID: 496797.

Classification: Biota; Chromista; Harosa; Heterokonta; Ochrophyta; Phaeophyceae; Dictyotophycidae; Sphacelariales; Sphacelariaceae; Sphacelaria