Koi Carp Kokoda glass perchlet Kokoda mogurnda Kokraimoro tube-snouted ghost knifefish Kokuni Kolombatovic's goby Kolus Komodo cardinalfish Komodo damselfish Komodo fangblenny Komodo viviparous brotula Komodo whiptail Kongoro lampeye Koningsberger's herring Konti barb Konye Koragu tank goby Korai-kitsunemebaru Korean bittering Korean bonefish Korean darter dragonet Korean dragonet Korean lamprey Korean prickleback Korean rockfish Korean sandlance Korean seerfish Korean skate Korean Snake eel Korean stumpy bullhead Korechika's dwarfoby Korhi barb Korogwe tilapia Koromo Koi Koshi Nangra Kosi rockskipper Kosogol grayling Kosswig’s barb Kosswig’s barbell Kotaka’s argentine Kotlyar's cubehead Kotlyar's whiptail Kottelat rasbora Kotthaus’ deepwater dragonet Kranji drombus Krasyukova's perch Krauss' blenny Krefft's dreamer Krefft's frillgoby Krefft's ray