|Researched by||Emily Wilson||Refereed by||Admin|
|Other common names||-||Synonyms||-|
A colonial hydroid that grows up to 15 cm or more. It is straggly in appearance with alternate branches, widely spaced along the stem. The hydrothecae, a supporting, nonliving, protein-chitinous envelope surrounding the stem, is large, up to 1.6 mm long, tubular and variously outward curving. It is easily mistaken for a sparsely branched form of Abietinaria abietina but is distinguished by opposite hydrothecae.
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Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
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Last Updated: 17/07/2002