Bryozoans in this family form erect tufted colonies. Autozooids are long and slender, attenuating proximally, with a membranous frontal area; arranged singly or paired back to back, in branching series, the buds arising disto-basally. No spines, avicularia or ooecia.
Two British genera are included in this family, Eucratea and Brettia. The genus Brettia and its type B. pellucid Dyster, 1858, are based on a single specimen collected at Tenby. It has not been found since and the type material, slide number 1899.7.1.958 in the British Museum (Natural History) collection, is unrecognizable. A decision on the status, or even the existence, of this species must await discovery of fresh material. It is noteworthy that the slide of the type material includes a single, detached zooid of a species of Bugula.
(Hayward and Ryland, 1998)