There are a number of lists of fictional species:

Extraterrestrial

• List of fictional extraterrestrials (by media type)
• Lists of fictional alien species: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z

Humanoid

• Lists of humanoids
  • Literature
  • Comics
  • Television
  • Film
  • Video games
• Paleoanthropological hoaxes
  • Cardiff Giant
  • Nebraska Man
  • Piltdown Man
• Freak show
• Humanzee
• List of fictional extraterrestrials

Legendary

• List of legendary creatures
  • List of legendary creatures by type
• List of giants in mythology and folklore
• Vampire folklore by region

Mythical

• Legendary creatures of the Argentine Northwest region
• Mythical creatures in Burmese folklore
• List of Greek mythological creatures
• List of legendary creatures from Japan
• List of Philippine mythological creatures
• Supernatural beings in Slavic folklore

Plants and fungi

• List of fictional plants

Reptilian

• List of dragons
  • List of dragons in mythology and folklore
  • List of dragons in literature
  • List of dragons in popular culture
  • List of dragons in film and television
  • List of dragons in games
• List of fictional dinosaurs

Theological

• List of fictional angels
• List of fictional demons

This article includes a species-related list of lists.