• Thalamita quadrilobata Togefutaha-benitsuke-gani
  
• Thalamita sexlobata Challenger-benitsuke-gani
  
• Thalamita sima Futaha-benitsuke-gani
  
• Thalamita spinifera Indo-benitsuke-gani
  
• Thalamita spinimana Fiji-benitsuke-gani
  
• Thalamita stephensoni Stephenson-benitsuke-gani
  
• Thalamita stimpsoni Amami-benitsuke-gani
  
• Thalamita wakensis Wake-benitsuke-gani
  
• Thalamita yoronensis Yoron-benitsuke-gani
  
• Thalamitoides quadridens Midori-benitsuke-gani
  
• Thalamitoides tridens Hime-midori-benitsuke-gani
  
• Thalassograpsus harpax Minami-hiraiso-modoki
  
• Thalia democratica
• Thamnostoma russelli
• Themisto abyssorum
• Themisto compressa
• Thetys vagina
• Thoralus cranchii
• Thysanoessa gregaria
• Thysanoessa inermis
• Thysanoessa longicaudata
• Thysanoessa raschi
• Thysanopoda acutifrons
• Thysanopoda microphtalma
• Tiaramedon spinosum Toge-komachigani
  
• Tiarinia angusta Tsunodashi-ísokuzugani
  
• Tiarinia cornigera Isokuzugani
  
• Tiarinia depressa Hira-ísokuzugani
  
• Tiarinia spinigera Toge-ísokuzugani
  
• Tiarinia tiarata Hime-ísokuzugani
  
• Tiaropsis multicirrata
• Tima bairdi
• Tmethypocoelis ceratophora Tsunome-chigogani
  
• Tmethypocoelis choreutes Kosuge-tsunome-chigogani
  
• Todarodes sagittatus
• Todaropsis eblanae
• Tomopteris helgolandica
• Tomopteris septentrionalis
• Trachycarcinus balssi Tsunokuri-gani
  
• Trachycarcinus elegans Kebuka-tsunokuri-gani
  
• Trachycarcinus ovalis Oh-tsunokuri-gani
  
• Trachycarcinus sagamiensis Sagami-tsunokuri-gani
  
• Trapezia cheni Taiwan-sangogani
  
• Trapezia cymodoce Sangogani
  
• Trapezia digitalis Kuro-sangogani
  
• Trapezia ferruginea Kabairo-sangogani
  
• Trapezia flavopunctata Yellow-spotted guard crab
  Arame-sangogani
  
• Trapezia formosa Smith-sangogani
  
• Trapezia garthi Galil-sangogani
  
• Trapezia guttata Kanoko-sangogani