Cladostephus spongiosus (Hudson) C. Agardh
Also known as Cladostephus verticillatus.
Description: Frond narrow, tough and wiry, but
soft to the touch, dark brown to black when dry, 2-3 mm wide and
up to 250 mm long. Strongly resembling a bottle-brush plant or
laboratory glass-cleaning brushes becasue of whorls of filaments
arising from the main axis (below, magnified). Branching
irregularly dichotomous. Plants with the whorls missing may
resemble
Ahnfeltia plicata.
The coralline alga
Jania rubens is
frequently found growing as an epiphyte at the base of the
fronds.
Habitat: On rocks and stones, gnerally in areas
affected by sand, intertidal and shallow subtidal.
Distribution: Widely distributed and common.
Key characteristics: Bottle-brush
appearance.
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