lungfish

/lʌŋfɪʃ/
noun
  1. A type of fish that has one or two lungs in addition to gills, allowing it to breathe air and survive in water with low oxygen or during droughts.
    • Scientists study the lungfish to understand how animals evolved to live on land.
    • The lungfish can survive out of water for months by burying itself in mud.
    • During the dry season, the lungfish breathes air directly through its mouth.