Description: Small tufts of fine uniseriate filaments to 8 cms long with alternate branching, attenuate, often ending in short pseudohairs.

Habitat: Rare. Epiphytic on various host algae.

Distribution: Recorded from a few scattered sites around the British Isles. Europe: Portugal, Spain, France and the Netherlands. Atlantic coast of North America: Canada, Massachusetts, Rhode Island, Connecticut and Long Island, Maryland, Virginia, North Carolina and Florida. Further afield: the Canary Islands, West Indies, California, Arabian Sea, and the Persian Gulf (Pakistan).

Similar Species: Many fine filamentous brown algae are similar and require microscopic examination for identification.

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

iNaturalist: Hincksia mitchelliae at iNaturalist World Species Observations database.

WoRMS: Hincksia mitchelliae at World Register of Marine Species.