1. Provided with gills
   - gilled

Antonym: abranchiate

• finnan haddie
• finnan haddock
• Klavier
• klaxon
• Klebs-Loeffler bacillus
• klebsiella
• Klee
• Kleenex
• Klein
• Klein bottle
• Kleist
• Klemens Metternich
• kleptocracy
• kleptomania
• kleptomaniac
• klezmer
• klick
• klieg light
• Klimt
• Kline
• Klinefelter
• Klinefelter syndrome
• Klinefelter's syndrome
• klipspringer
• klondike