Ceramium secundatum is a small marine red alga.
Description This species is cylindrical and fundamentally monosiphonous.Jones, W.E. 1962. A key to the genera of the British Seaweeds. Field Studies Vol. 1 no. 4 pp 1 - 31 It appears as tufts of erect axes to 14 cm long, densely branched attached by multicellular rhizoids. The main axes has strongly in-rolled apices. Although completely corticated it may appear banded when young. It does not show spines. The cortical cells develop from the nodes between the axial cells. Adventitious branches are abundant.Maggs, C.A. and Hommersand, M.H. 1993. Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales. The Natural History Museum, London.
Reproduction The species is dioecious. Tetraspores occur in whorls on the young axes.Newton, L. 1931. A Handbook of the British Seaweeds. London Found epiphytic on other algae and on artificial material in the sublittoral to 11m deep.
Distribution Recorded from the Great Britain and Ireland.
Habitat Common in the littoral,Bunker, F.StP.D. Maggs, C.A., Brodie, J.A. Bunker, A.R. 2017, Seaweeds of Britain and Ireland Second Edition, Wild Nature Press, Plymouth, UK and epiphytic on other algae and artificial material.
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