Catch-tentacles in sea anemones: occurrence inHaliplanella luciae(Verrill) and a review of current knowledge

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Abstract
The occurrence of catch-tentacles or Fangtentakeln in the sea anemone Haliplanella luciae is reported for the first time, and some aspects of their anatomy and behaviour are noted. Provision is made for this discovery in the diagnoses of the family Haliplanellidae and the genus Haliplanella. The species of acontiarian anemones at present known to possess catch-tentacles are listed. The cnidom and the function (probably aggressive) of catch-tentacles are discussed. Comparisons are drawn between the catch-tentacles of acontiarian anemones and the acrorhagi of endomyarian anemones and some evolutionary aspects are considered.