This list shows all fish common names beginning with the letter O.
A B C D E F G H I J K L M N o P Q R S T U V W X Y Z
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| 1. | Oaxaca Livebearer | Poeciliopsis lutzi | (i: 0, k: 0) |
| 2. | Obbes' Tandan | (i: 4, k: 0) | |
| 3. | Ocellated Synodontis | (i: 11, k: 0) | |
| 4. | Odessa Barb | (i: 2, k: 0) | |
| 5. | Ogôoué Lampeye | Plataplochilus terveri | (i: 0, k: 0) |
| 6. | Ogre Catfish | (i: 15, k: 0) | |
| 7. | Oil Catfish | (i: 26, k: 1) | |
| 8. | Oilspotted Pleco | (i: 1, k: 0) | |
| 9. | Okavango Tilapia | Tilapia ruweti | (i: 0, k: 1) |
| 10. | Olga Cory | (i: 13, k: 0) | |
| 11. | Olive Barb | (i: 1, k: 0) | |
| 12. | Olive Cory | (i: 2, k: 0) | |
| 13. | Olive Skiffia | Skiffia lermae | (i: 0, k: 0) |
| 14. | Omani Blind Cave Fish | (i: 1, k: 0) | |
| 15. | One Spot Pangasius | (i: 7, k: 0) | |
| 16. | One-line Pencilfish | (i: 1, k: 0) | |
| 17. | One-spot Betta | Betta unimaculata | (i: 0, k: 0) |
| 18. | One-stripe Spinyeel | Macrognathus aral | (i: 0, k: 0) |
| 19. | Oneline Tetra | Nannaethiops unitaeniatus | (i: 0, k: 0) |
| 20. | Onesided Livebearer | Jenynsia lineata | (i: 0, k: 0) |
| 21. | Onespot Barb | (i: 1, k: 0) | |
| 22. | Opal Allotoca | (i: 1, k: 0) | |
| 23. | Opal Cory | (i: 1, k: 0) | |
| 24. | Opal Spot Pleco | (i: 31, k: 0) | |
| 25. | Opaline Gourami | (i: 6, k: 0) | |
| 26. | Orange Banded Cory | (i: 3, k: 0) | |
| 27. | Orange Banded Hillstream Catfish | (i: 6, k: 0) | |
| 28. | Orange Banded Stone Catfish | (i: 6, k: 0) | |
| 29. | Orange Black Pleco | (i: 1, k: 0) | |
| 30. | Orange Catfish | (i: 29, k: 0) | |
| 31. | Orange Catfish | (i: 42, k: 0) | |
| 32. | Orange Cheek Pinecone Pleco | (i: 14, k: 0) | |
| 33. | Orange Chromide | (i: 1, k: 0) | |
| 34. | Orange Cory | (i: 1, k: 0) | |
| 35. | Orange Fin Bristlenose | Ancistrus sp. (L369) | (i: 0, k: 0) |
| 36. | Orange Fin Bristlenose | Ancistrus sp. (L371) | (i: 0, k: 0) |
| 37. | Orange Finned Oyapok Pleco | (i: 1, k: 0) | |
| 38. | Orange Lane Pleco | Hypostomus sp. (L222) | (i: 0, k: 0) |
| 39. | Orange Seam Ghost Pleco | (i: 4, k: 0) | |
| 40. | Orange Seam Pleco | (i: 28, k: 0) | |
| 41. | Orange Spot Pleco | (i: 24, k: 0) | |
| 42. | Orange Spotted Bristlenose | (i: 8, k: 0) | |
| 43. | Orange Spotted Sunfish | Lepomis humilis | (i: 0, k: 0) |
| 44. | Orange Stripe Cory | (i: 14, k: 0) | |
| 45. | Orange Striped Squeaker | (i: 14, k: 0) | |
| 46. | Orange Tiger Pleco | (i: 7, k: 0) | |
| 47. | Orange-cheek Betta | (i: 12, k: 0) | |
| 48. | Orange-fringed Largemouth | Chetia brevis | (i: 0, k: 0) |
| 49. | Orange-pattern Pleco | Hemiancistrus votouro | (i: 0, k: 0) |
| 50. | Orange-spotted Grouper | (i: 1, k: 0) | |
| 51. | Orangefin Madtom | (i: 1, k: 0) | |
| 52. | Orangetailed Halffin Pleco | (i: 2, k: 0) | |
| 53. | Orangethroat Darter | Etheostoma spectabile | (i: 0, k: 0) |
| 54. | Orca Cory | (i: 2, k: 0) | |
| 55. | Oregon Fossil Catfish | (i: 1, k: 0) | |
| 56. | Oremon Catfish | (i: 29, k: 0) | |
| 57. | Orinoco Angel Pleco | (i: 17, k: 0) | |
| 58. | Orinoco Bristlenose | (i: 1, k: 0) | |
| 59. | Orinoco Butterfly Pleco | (i: 49, k: 0) | |
| 60. | Orinoco Eartheater | Biotodoma wavrini | (i: 0, k: 0) |
| 61. | Orinoco Galaxy Pleco | (i: 24, k: 0) | |
| 62. | Orinoco Pinecone Pleco | (i: 2, k: 0) | |
| 63. | Orinoco Polka-dot Pleco | (i: 26, k: 0) | |
| 64. | Orinoco Sailfin Catfish | (i: 2, k: 0) | |
| 65. | Orinoco Talking Catfish | (i: 13, k: 0) | |
| 66. | Orinoco Tiger Pleco | (i: 1, k: 0) | |
| 67. | Orituco Harlequin Whiptail | (i: 5, k: 0) | |
| 68. | Ornate Bagrid | (i: 8, k: 0) | |
| 69. | Ornate Bichir | (i: 1, k: 0) | |
| 70. | Ornate Cory | Brochis (sub-clade 3) sp. (C152) | (i: 0, k: 0) |
| 71. | Ornate Cory | (i: 3, k: 1) | |
| 72. | Ornate Halffin Pleco | Lasiancistrus sp. (L386) | (i: 0, k: 0) |
| 73. | Ornate Limia | Poecilia ornata | (i: 0, k: 0) |
| 74. | Ornate Paradisefish | Malpulutta kretseri | (i: 0, k: 0) |
| 75. | Ornate Pimelodus | (i: 21, k: 0) | |
| 76. | Ornate Rainbowfish | Rhadinocentrus ornatus | (i: 0, k: 0) |
| 77. | Ornate Rubbernose | (i: 30, k: 0) | |
| 78. | Ornate Shadow Catfish | (i: 3, k: 0) | |
| 79. | Ornate Tetra | (i: 1, k: 1) | |
| 80. | Orocue Cory | (i: 3, k: 0) | |
| 81. | Otjikoto Tilapia | Tilapia guinasana | (i: 0, k: 0) |
| 82. | Oto | (i: 28, k: 0) | |
| 83. | Oto | (i: 3, k: 0) | |
| 84. | Oto | (i: 11, k: 0) | |
| 85. | Oto | (i: 5, k: 0) | |
| 86. | Otorongo Woodcat | (i: 14, k: 0) | |
| 87. | Ouachita Madtom | (i: 1, k: 0) | |
| 88. | Oyapock Eartheater | Geophagus camopiensis | (i: 0, k: 0) |
| 89. | Oyapok Hook Fin Pleco | (i: 1, k: 0) | |
| 90. | Ozark Bass | Ambloplites constellatus | (i: 0, k: 0) |
| 91. | Ozark Madtom | (i: 1, k: 0) |
/siluriformes/plotosidae/porochilus/obbesi/1.jpg "Porochilus obbesi")
/siluriformes/mochokidae/synodontis/ocellifer/1.jpg "Synodontis ocellifer")
/cypriniformes/cyprinidae/pethia/padamya/1.jpg "Pethia padamya")
/siluriformes/auchenipteridae/asterophysus/batrachus/1.jpg "Asterophysus batrachus")
/siluriformes/auchenipteridae/duringlanis/perugiae/1.jpg "Duringlanis perugiae")
/siluriformes/loricariidae/peckoltia/sp%28l478%29/1.jpg "Peckoltia sp. (L478)")
/siluriformes/callichthyidae/corydoras/simulatus/1.jpg "Corydoras simulatus")
/cypriniformes/cyprinidae/systomus/cf_sarana/1.jpg "Systomus cf. sarana")
/siluriformes/callichthyidae/gastrodermus/sp%28cw019%29/1.jpg "Gastrodermus sp. (Cw019)")
/cypriniformes/cyprinidae/garra/barreimiae/1.jpg "Garra barreimiae")
/siluriformes/pangasiidae/pangasius/larnaudii/1.jpg "Pangasius larnaudii")
/characiformes/lebiasinidae/nannostomus/unifasciatus/1.jpg "Nannostomus unifasciatus")
/cypriniformes/cyprinidae/puntius/terio/1.jpg "Puntius terio")
/cyprinodontiformes/goodeidae/allotoca/dugesii/1.jpg "Allotoca dugesii")
/siluriformes/callichthyidae/brochis(sc3)/sp%28cw013%29/1.jpg "Brochis (sub-clade 3) sp. (Cw013)")
/siluriformes/loricariidae/scobinancistrus/raonii/1.jpg "Scobinancistrus raonii")
/perciformes/osphronemidae/trichopodus/trichopterus/1.jpg "Trichopodus trichopterus")
/siluriformes/callichthyidae/brochis(sc3)/sp%28cw117%29/1.jpg "Brochis (sub-clade 3) sp. (Cw117)")
/siluriformes/akysidae/akysis/vespa/1.jpg "Akysis vespa")
/siluriformes/loricariidae/ancistrini/sp%28l069%29/1.jpg "Ancistrini sp. (L069)")
/siluriformes/pseudopimelodidae/lophiosilurus/fowleri/1.jpg "Lophiosilurus fowleri")
/siluriformes/pseudopimelodidae/lophiosilurus/apurensis/1.jpg "Lophiosilurus apurensis")
/siluriformes/loricariidae/pseudorinelepis/sp%28l095%29/1.jpg "Pseudorinelepis sp. (L095)")
/perciformes/cichlidae/pseudetroplus/maculatus/1.jpg "Pseudetroplus maculatus")
/siluriformes/callichthyidae/brochis(sc3)/sp%28cw113%29/1.jpg "Brochis (sub-clade 3) sp. (Cw113)")
/siluriformes/loricariidae/peckoltia/sp%28l061%29/1.jpg "Peckoltia sp. (L061)")
/siluriformes/loricariidae/ancistomus/cf_snethlageae/1.jpg "Ancistomus cf. snethlageae")
/siluriformes/loricariidae/peckoltia/sp%28l076%29/1.jpg "Peckoltia sp. (L076)")
/siluriformes/loricariidae/panaqolus/albomaculatus/1.jpg "Panaqolus albomaculatus")
/siluriformes/loricariidae/ancistrus/hoplogenys/1.jpg "Ancistrus hoplogenys")
/siluriformes/callichthyidae/osteogaster/sp%28cw014%29/1.jpg "Osteogaster sp. (Cw014)")
/siluriformes/mochokidae/synodontis/flavitaeniatus/1.jpg "Synodontis flavitaeniatus")
/siluriformes/loricariidae/peckoltia/wernekei/1.jpg "Peckoltia wernekei")
/perciformes/osphronemidae/betta/macrostoma/1.jpg "Betta macrostoma")
/perciformes/epinephelidae/epinephelus/coioides/1.jpg "Epinephelus coioides")
/siluriformes/ictaluridae/noturus/gilberti/1.jpg "Noturus gilberti")
/siluriformes/loricariidae/lasiancistrus/sp%28l479%29/1.jpg "Lasiancistrus sp. (L479)")
/siluriformes/callichthyidae/corydoras/desana/1.jpg "Corydoras desana")
/siluriformes/hypsidoridae/hypsidoris/oregonensis/1.jpg "†Hypsidoris oregonensis")
/siluriformes/loricariidae/hypancistrus/sp%28l201%29/1.jpg "Hypancistrus sp. (L201)")
/siluriformes/loricariidae/ancistrus/sp%28l125%29/1.jpg "Ancistrus sp. (L125)")
/siluriformes/loricariidae/dekeyseria/picta/1.jpg "Dekeyseria picta")
/siluriformes/loricariidae/leporacanthicus/cf_galaxias%28l240%29/1.jpg "Leporacanthicus cf. galaxias(l240)")
/siluriformes/loricariidae/pseudorinelepis/sp%28l152%29/1.jpg "Pseudorinelepis sp. (L152)")
/siluriformes/loricariidae/hypancistrus/contradens/1.jpg "Hypancistrus contradens")
/siluriformes/loricariidae/pterygoplichthys/multiradiatus/1.jpg "Pterygoplichthys multiradiatus")
/siluriformes/doradidae/orinocodoras/eigenmanni/1.jpg "Orinocodoras eigenmanni")
/siluriformes/loricariidae/peckoltia/sp%28l103%29/1.jpg "Peckoltia sp. (L103)")
/siluriformes/loricariidae/loricaria/sp%60rio_orituco%60/1.jpg "Loricaria sp. `RIO ORITUCO`")
/siluriformes/claroteidae/chrysichthys/ornatus/1.jpg "Chrysichthys ornatus")
/polypteriformes/polypteridae/polypterus/ornatipinnis/1.jpg "Polypterus ornatipinnis")
/siluriformes/callichthyidae/brochis(sc3)/ornatus/1.jpg "Brochis (sub-clade 3) ornatus")
/siluriformes/pimelodidae/pimelodus/ornatus/1.jpg "Pimelodus ornatus")
/siluriformes/loricariidae/chaetostoma/sacramento/1.jpg "Chaetostoma sacramento")
/siluriformes/bagridae/hyalobagrus/ornatus/1.jpg "Hyalobagrus ornatus")
/characiformes/acestrorhamphidae/megalamphodus/bentosi/1.jpg "Megalamphodus bentosi")
/siluriformes/callichthyidae/hoplisoma/esperanzae/1.jpg "Hoplisoma esperanzae")
/siluriformes/loricariidae/otocinclus/vittatus/1.jpg "Otocinclus vittatus")
/siluriformes/loricariidae/otocinclus/sp%281%29/1.jpg "Otocinclus sp. (1)")
/siluriformes/loricariidae/otocinclus/macrospilus/1.jpg "Otocinclus macrospilus")
/siluriformes/loricariidae/otocinclus/mariae/1.jpg "Otocinclus mariae")
/siluriformes/auchenipteridae/spinipterus/moijiri/1.jpg "Spinipterus moijiri")
/siluriformes/ictaluridae/noturus/lachneri/1.jpg "Noturus lachneri")
/siluriformes/loricariidae/harttia/sp%28l053%29/1.jpg "Harttia sp. (L053)")
/siluriformes/ictaluridae/noturus/albater/1.jpg "Noturus albater")