Halcampidae
Halcampidae is a family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates.
Genera in the family include:Acthelmis Lütken, 1875Cactosoma Danielssen, 1890Calamactinia Carlgren, 1949Calamactis Carlgren, 1951Halcampa Gosse, 1858HalcampasterHalcampella Andres, 1883Halcampoides Danielssen, 1890HalianthellaKodioidesMenaMetedwardsiaNeohalcampaParahalcampaPentactinia Carlgren, 1900Scytophorus Hertwig, 1882Siphonactinopsis Carlgren, 1921
Characteristics
Species of Halcampidae mostly have elongated columns which are sometimes differentiated into different regions. The base is usually rounded but in some species it is flattened. There is no sphincter. There are up to forty tentacles, all of equal length. There are up to twenty pairs of perfect mesenteries with strong retractors. There are one or two siphonoglyphs.