Okadaiidae , Okamejei , Okamira , Okamotoperla , Okamuraea , Okamuraea , Okamurina , Okapa , Okapia , Okaundua , Okavirus , Okayamayusurika ,
- Rod Vayssierea Risbec, 1928
Animalia → Mollusca → Gastropoda → Nudibranchia → Polyceroidea
- Okamejei acutispina (Ishiyama, 1958)
- Okamejei arafurensis Last & Gledhill, 2008
- Okamejei boesemani (Ishihara, 1987)
- Okamejei cairae Last, Fahmi & Ishihara, 2010
- Okamejei heemstrai (McEachran & Fechhelm, 1982)
- Okamejei hollandi (Jordan & Richardson, 1909)
- Okamejei jensenae Last & Lim, 2010
- Okamejei kenojei (Müller & Henle, 1841)
- Okamejei leptoura Last & Gledhill, 2008
- Okamejei meerdervoortii (Bleeker, 1860)
- Okamejei mengae Jeong, Nakabo & Wu, 2007
- Okamejei philipi (Lloyd, 1906)
- Okamejei pita (Fricke & Al-Hassan, 1995)
- Okamejei powelli (Alcock, 1898)
- Okamejei schmidti (Ishiyama, 1958)
Animalia → Chordata → Elasmobranchii → Rajiformes → Rajidae
- Okamira pulchra Galileo & Martins, 2005
Animalia → Arthropoda → Insecta → Coleoptera → Cerambycidae
- Okamotoperla zonata (Okamoto, 1922)
Animalia → Arthropoda → Insecta → Plecoptera → Nemouroidea → Taeniopterygidae → Brachypterainae
- Okamuraea brachydictyon (Cardot) Nog.
- Okamuraea brevipes Broth. ex S. Okamura
- Okamuraea filipendula Dixon ex Lazarenko
- Okamuraea hakoniensis (Mitt.) Broth.
- Okamuraea hakoniensis f. multiflagellifera (Sakurai) Nog.
- Okamuraea micrangia (Müll. Hal.) Y.F. Wang & R.L. Hu
- Okamuraea plicata Cardot
Plantae → Bryophyta → Bryopsida → Leucodontales → Leucodontaceae
- Okamurina pacifica (Yamada) A.D.Zinova, 1972[1]
Plantae → Rhodophyta → Florideophyceae → Ceramiales → Delesseriaceae
Animalia → Chordata → Mammalia → Artiodactyla → Giraffidae
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Okapia johnstoni
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Okapia johnstoni
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Okapia johnstoni, Cincinnati Zoo
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Okapia johnstoni
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Okapia johnstoni, rasprostranjenost
- Okavirus gill-associated virus [2]
Viruses → Nidovirales → Roniviridae
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