Shrivenzales are a species of vaguely lizard-like quadrupedal predators native to the planet Ribos, 300 light-years from the Magellanic Cloud. They have rubbery green skin, a huge mouth and enormous clawed paws on the end of their short legs. Their sense of hearing is highly sensitive and extends into the ultrasound spectrum. They are naturally nocturnal, sleeping in the catacombs of the city of Shur during the day and hunting small prey on the tundra at night. One Shrivenzale acts as a guard animal to protect the crown jewels of Shur from robbery.


  • Doctor Who, season 16 (Fourth Doctor) - The Ribos Operation (1976)

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