| K |
| k-selected species |
| k-selection |
| K-value |
| Kabayaki |
| kakaban |
| Kalahiutale |
| Kalapihvri |
| Kalapulla |
| Kalbfisch |
| Kallrökt kolja |
| Kaltgeräucherter Schellfisch |
| Kamaboko |
| Kantianism |
| Kanudi Fisheries Research Station, Konedobu, Papua New Guinea |
| Kanyu no niziru |
| Kapi |
| Kara Sea |
| Karasumi |
| Karavala |
| karyology |
| karyotype |
| Katsuo bushi |
| Kattegat, Sound and Belts |
| Kaviaar |
| Kaviaari |
| Kaviar |
| Kazunoko |
| Kedgeree |
| keel |
| keeping time |
| Kelly's eye |
| Kelpfishes |
| kelt |
| kench |
| Kench cure |
| keratin |
| keris |
| Keta Kaviar |
| keystone species |
| Kieler Sprotten |
| Kiev Museum |
| kill |
| Killifishes (toothcarps) |
| kin selection |
| kingdom |
| Kingdom Animalia |
| Kingdom Fungi |
| Kingdom Plantae |
| Kingdom Prokaryotae (formerly Monera) |
| Kingdom Protoctista |
| Kipper |
| Kippered salmon |
| Kissing gourami |
| Kleptobiosis |
| Kleptoparasite |
| Kleptoparasitism |
| Klipfish |
| klondyked fish |
| Klondyked herring |
| knephopelagic |
| Knifejaws |
| knoll |
| knot |
| knotless net |
| Kochfischwaren |
| Koldrøget kullerfilet |
| Koljamuhennos |
| Koljestuvning |
| Kombu |
| Kongeål |
| Koteletfisk |
| Koudgerookte schelvis |
| Koudgerookte vlinders |
| Krill |
| krohnius stage |
| Kronsardinen |
| Kronsardiner |
| Kupffer's vesicle |
| Kuronori |
| Kusaya |
| Kyabia |
| Kylmäsavustettu koljafilee |
| kype |
