List of fictional alien species: W

Name	Source	Type
Wadi	Star Trek
	Robert J. Sawyer's
	Noon Universe
Wang's Carpets	Greg Egan's Diaspora
Wankh	Jack Vance's Planet of Adventure series	Black frog-like humanoids
The Watcher	Marvel Comics
Waterseekers	Red Planet
Weeping Angels	Doctor Who	Statue-like humanoid
Weevils	Torchwood	Humanoid
	Larry Niven's Known Space
Willis the Bouncer	Red Planet
	DC Comics' Legion of Super-Heroes
Wirrn	Doctor Who
Wisps	Sonic the Hedgehog	Squid-like creatures of various shapes and colors
	Star Trek
Wolfweeds	Doctor Who
Wookiees	Star Wars	Humanoid
Wraith	Stargate	The wraith looks like a human; the difference is the grey skin, the long hair of all of them, and some little holes in the face.
W'rkncacnter	Marathon Trilogy