1) Cornish legendary creature 2) High fantasy novel 3) Shannara novel 
Morgawr is the third book in the The Voyage of the Jerle Shannara fantasy trilogy by Terry Brooks. It was first published in 2002. ==Plot summary== The Morgawr is a centuries-old sorcerer of unimaginable might, who feeds upon the souls of his enemies. With a fleet of airships and a crew of walking dead men at his command, he is in relentless pursu...
Popular, large hump-backed water serpent
Cryptozoology/Real Life?) - Supposedly, this sea monster lives in Falmouth Bay in Cornwall.