Druhy rybovitých obratlovců

Kraemeria cunicularia Rofen, 1958

Kraemeria galatheaensis Rofen, 1958

Kraemeria merensis Whitley, 1935

Kraemeria nuda (Regan, 1908)

Kraemeria samoensis Steindachner, 1906

Kraemeria tongaensis Rofen, 1958

Krefftichthys anderssoni (Lönnberg, 1905)

lampovník Anderssonův

Kribia kribensis (Boulenger, 1907)

Kribia leonensis (Boulenger, 1916)

Kribia nana (Boulenger, 1901)

Kribia uellensis (Boulenger, 1913)

Krobia guianensis (Regan, 1905)

akara guyanská

Krobia itanyi (Puyo, 1943)

akara delfínová

Krobia petitella Steele, Liverpool & López-Fernández, 2013

Krobia xinguensis Kullander, 2012

akara xinguská

Kronichthys heylandi (Boulenger, 1900)

lorikárie Heylandova

Kronichthys lacerta (Nichols, 1919)

lorikárie iguapská

Kronichthys subteres Miranda Ribeiro, 1908

lorikárie betarinská

Kronoheros umbrifer (Meek & Hildebrand, 1913)

kančík potemnělý

Krusensterniella infans Chernova, 2022

Krusensterniella kurilensis Chernova, 2022

Krusensterniella maculata Andriashev, 1938

slimule skvrnitá

Krusensterniella multispinosa Soldatov, 1922

slimule mnohotrnná

Krusensterniella notabilis Schmidt, 1904

slimule znamenaná

Krusensterniella pavlovskii Andriashev, 1955

slimule Pavlovského

Krusensterniella pseudomaculata Chernova, 2022

Krusensterniella squamosa Chernova, 2022

Kryptoglanis shajii Vincent & Thomas, 2011

Kryptolebias brasiliensis (Valenciennes, 1821)

rivulus brazilský

Kryptolebias campelloi (Costa, 1990)

rivulus Campbellův