• Actumnus setifer Suehiro-íbotegani
  
• Actumnus setosiareolatus Masatsune-íbotegani
  
• Actumnus squamosus Ibotegani
  
• Aequorea forskalea
• Aequorea macrodactyla
• Aequorea vitrina
• Aethra edentata Himemenko-hishigani
  
• Aethra scruposa Menko-hishigani
  
• Agalma elegans
• Aglantha digitale
• Alaurina composita
• Alciopa reynaudii
• Alloteuthis medius
• Alloteuthis subulatus
• Alox latusoides Tsuno-karuishi-kobushi
  
• Alox ornatum Karuishi-kobushi
  
• Alox rugosum Shiwa-karuishi-kobushi
  
• Alox zalion Kii-karuishi-kobushi
  
• Amblyops abbreviata
• Amblyops kempi
• Amphinema dinema
• Amphinema rugosum
• Anchialina agilis
• Angulorostrum segonzaci
• Antilibinia gilloloensis Hime-maru-mogani
  
• Apolemia uvaria
• Appendicularia sicula
• Arachnactis albida
• Arcania cornuta Yokotsuno-kobushi
  
• Arcania elongata Naga-jyuíchitoge-kobushi
  
• Arcania erinacea Toge-nagajyuíchi-kobushi
  
• Arcania globata Hime-toge-kobushi
  
• Arcania gracilis Montsuki-toge-kobushi
  
• Arcania heptacantha Nana-toge-kobushi
  
• Arcania sagamiensis Sagami-toge-kobushi
  
• Arcania septemspinosa Fabricius-toge-kobushi
  
• Arcania undecimspinosa Jyuíchi-toge-kobushi
  
• Archiconchoecia af cucullata
• Archiconchoecia bispicula
• Archiconchoecia cucullata
• Archiconchoecia gastrodes
• Archiconchoecia pilosa
• Archiconchoecia ventricosa
• Archiconchoecia versicula
• Architeuthis dux
• Ashtoret lunaris Komongani
  
• Ashtoret maculata Miers-kinsengani
  
• Ashtoret miersii Madara-kinsengani
  
• Ashtoret picta Gohsyu-komongani
  
• Asterias rubens