Shell Family of Taiwan
Janthinidae 紫螺科contain7 species in Taiwan，show1 - 7
 
Janthinidae 紫螺科：Shell thin, helicinoid with selenizone on spires. Aperture broad. No operculum. No eye. Cephalic tentacle bifid. Excrete mucous from sole to form raft of bubble with animal spends pelagic life.
Senitfic Name
Chinese Name
omenclator
photo
 Janthina exigua   Lamarck, 1816  
 Janthina janthina 紫螺  (Linnaeus, 1758)  
 Janthina prolongata   de Blainville  
 Jodina umbilicata 侏儒紫螺  (d'Orbigny, 1847)  
 Recluzia jehennei   Petit, 1853  
 Recluzia lutea 淡黃紫螺  (Bennett, 1840)  
 Violetta globosa 琉璃紫螺  (Swainson, 1823)