Description: Crust to cushions to about 1cm thick; spreading in patches to more than 1m across. Creamy to brownish or greenish yellow, orange. Compressible, fairly resilient; breaks when bent through ca. 90o. Quite numerous, of moderate size.

Habitat: Vertical hard substrate faces, from shallow sublittoral (well-shaded and wave exposed) to 75m; on overhangs and under cobbles and boulders. Among Cystoseira (Topsent, 1891); may be associated with Axinella dissimilis.

Distribution: Known recently from Anglesey, Selsey Bill, Roscoff, Channel Isles, Lough Hyne. Apparently restricted to the south west of the British Isles?

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

iNaturalist: Stylostichon dives at iNaturalist World Species Observations database.