Nauplius, Nauplia or Nauplios , may refer to:

  • Nauplius (mythology), in Greek mythology, the son of Poseidon and Amymone, the father of Palamedes, and also the name of an Argonaut
  • Nauplia, a harbor town in Greece
  • Nauplius (larva), a life stage of crustaceans
  • Nauplius (plant), a genus in the family Asteraceae
  • Nauplius, a genus of copepods, considered synonymous with Cyclops (genus)
  • Nauplius, a genus of shrimp, considered synonymous with Alpheus (crustacean)
  • Nauplius (journal), an academic journal covering carcinology

Other

  • 9712 Nauplius, an asteroid