• Neogobius fluviatilis monkey goby
  bychok-peschanik
  guvid de balta
  
• Neogobius gymnotrachelus racer goby
  bychok-gonets
  zlavoaca
  
• Neogobius kessleri bighead goby
  bychock-golovach
  guvid de balta
  
• Neogobius melanostomus round goby
  bychok-kruglyak
  guvid
  
• Neogobius platyrostris flatsnout goby
  bychok-ryzhik
  
• Neogobius ratan ratan goby
  byckok-rotan
  
• Neogobius syrman syrman goby
  shirman
  
• Neonesthes capensis
• Neoscopelus macrolepidotus
• Neoscopelus microchir
• Nerophis lumbriciformis worm pipefish
  nerophis lombricoide
  kleine wormzeenaald
  
• Nerophis maculatus nerophis tachete
  serpeto
  
• Nerophis ophidion straight-nosed pipefish
  rophis
  alfiler
  pesce ago sottile
  
• Nesiarchus nasutus pes espada picudo
  
• Nessorhamphus ingolfianus duckbill oceanic eel
  
• Nettastoma melanurum blackfin sorcerer
  pico de pato
  
• Nezumia aequalis smooth grenadier
  
• Nezumia longebarbata bluntnose grenadier
  
• Nezumia sclerorhynchus roughtip grenadier
  
• Nomeus gronovii
• Normichthys operosus multipore searsid
  
• Notacanthus bonapartei shortfin spiny eel
  
• Notacanthus chemnitzii snubnosed spiny eel
  
• Notolepis rissoi
• Notolychnus valdiviae
• Notoscopelus bolini
• Notoscopelus caudispinosus
• Notoscopelus elongatus
• Notoscopelus kroeyerii
• Notoscopelus resplendens
• Nybelinella erikssoni
• Oblada melanura saddled bream
  oblade
  oblada
  occhiata
  usata
  dobrada
  melanouri
  melanurya
  shchor zanav
  kahlija
  
• Odondebuenia balearica coralline goby
  ghiozzetto delle Baleari
  
• Odontaspis ferox fierce shark
  odontaspide féroce
  sobrayo
  Stierhai
  cagnaccio
  morski pas
  skylopsaro
  
• Odontaspis noronhai Bigeye sand tiger
  Requin noronhai
  
• Odontomacrurus murrayi roundhead grenadier
  
• Odontostomops normalops Undistinguished sabretooth
  
• Oedalechilus labeo boxlip mullet
  mulet labéon
  caluga
  cefalo labbrone
  cipal supliak
  dudakli-kefal
  kifon siftani
  kaplat buri
  
• Oligopus ater
• Omosudis lowei
• Oncorhynchus gorbuscha humpback or pink salmon
  saumon rose
  gorbuscha
  pukkellaks
  
• Oncorhynchus keta chum or dog salmon
  saumon argente
  keta
  ketalaks
  
• Oncorhynchus kisutch Coho salmon
  Saumon coho
  Cohozalm
  
• Oneirodes anisacanthus
• Oneirodes carlsbergi
• Oneirodes clarkei Clarke's Dreamer
  
• Oneirodes eschrichtii
• Oneirodes macronema
• Oneirodes macrosteus
• Oneirodes myrionemus