Cladophora rupestris is a densely tufted plant, that grows up to 20 cm in height, with dark green or bluish coloured dull fronds. Typical specimens branch profusely upwards from the base, in an irregular, whorled or opposite pattern. The stoutness, density and arrangement of branches gives the seaweed a coarse feel.The morphology of the species is fairly constant over a wide range of habitat conditions and over a wide geographical area. Its morphology is affected by physical damage due to grazing by animals and loss of the apical region on reproduction, both instances are followed by regeneration and proliferation of branches. Cladophora rupestris sometimes forms an almost complete cover of stunted growth at high tide level and occasionally in the splash zone where pools are brackish. Filaments are short and branching dense in the most wave exposed locations (Burrows, 1991).
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