Chaetomorpha melagonium is a species of green algae of the family Cladophoraceae.
There is confusion as to whether there are two forms of this species - one attached and one unattached.Burrows, E.M. 1991. Seaweeds of the British Isles Volume 2 Chlorophyta. Natural History Museum, London
Description
The attached form is unbranched growing solitary or in a small group to 60 cm long. The filaments are attached at the base and are stiff and straight. In colour they are dark green with a glaucus sheen. Remarkably rigid and wiry.Harvey, W.H. 1841. A Manual of the British Algae: London The cells are so large they can be seen with naked eye.Hardy, F.G. and Guiry, M.D.2003. A Check-list and Atlas of the Seaweeds of Britain and Ireland. The British Phycological Society
Habitat Rock pools of the low littoral. Never abundant,Newton, J. 1931. A Handbook of the British Seaweeds. British Museum, London but widespread.
Distribution Widespread around the British Isles, along the Atlantic shores of Europe, Murman Sea, Greenland, Canadian Arctic.
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