Andrew 'Dumbo' Gallacher, 43, was found collapsed in his cell in HMP Addiewell. Tests later revealed his cause of death was intoxication from cocaine, street valium and antidepressants.

The dozen or so species that make up Grimpoteuthis are called Dumbo octopuses because of the two large fins—one on either side of the mantle—that protrude like ears. Add in the octopus’s ...