Description: Grows from a discoid holdfast to form erect, gelatinous and compressed fronds up to 5 cms long and about 2 mm broad. Branches dichotomously two or three times.

Habitat: Very rare. Habitat details in the British Isles unknown, however in other countries, is known to grow epilithically on stones in the sublittoral to 20 m deep.

Distribution: British Isles from: Northumberland and one site in Scotland. Europe: Helgoland, Denmark. North Atlantic coast of North America: Canada to Massachusetts. Further afield: Canary Islands.

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

iNaturalist: Tsengia bairdii at iNaturalist World Species Observations database.

WoRMS: Tsengia bairdii at World Register of Marine Species. Accepted name: Tsengia bairdii (Farlow) K.C.Fan & Y.P.Fan, 1962. AphiaID: 145649.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Halymeniales; Tsengiaceae; Tsengia