Another of Keane's Album concepts...
THE KETEA (or Cetea) were monsters of the Sea. The two greatest of
which were the Ketos killed by Perseus in Aithiopia and the Ketos
slain by Herakles in the Troad.
Ketea were usually depicted as serpentine fish withlong rows of sharp teeth. The Nereides were often depicted riding side-saddle on the backs of these creatures.