Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Pyramidellidae -  Pyramidellidae common name the pyram family or pyramid shells is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails marine heterobranch gastropod molluscs.
The answer to this question is:
Animal