Halcampidae
Halcampidae is a family (biology), family of sea anemones. Members of this family usually live with their column buried in sand or other soft substrates. Genera Genera in the family include: * ''Acthelmis'' Lütken, 1875 * ''Cactosoma'' Danielssen, 1890 * ''Calamactinia'' Carlgren, 1949 * ''Calamactis'' Carlgren, 1951 * ''Halcampa'' Gosse, 1858 * ''Halcampaster'' * ''Halcampella'' Andres, 1883 * ''Halcampoides'' Danielssen, 1890 * ''Halianthella'' * ''Kodioides'' * ''Mena (sea anemone), Mena'' * ''Metedwardsia'' * ''Neohalcampa'' * ''Parahalcampa'' * ''Pentactinia'' Carlgren, 1900 * ''Scytophorus'' Hertwig, 1882 * ''Siphonactinopsis'' 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 Mesentery (zoology), mesen ...
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