Calysteral cluster
From Tardis Wiki, the free Doctor Who reference
The Calysteral cluster was a location with several swamp planets. One planet was used by the Judoon as a prison planet. This planet was twenty million square sentons in area, and its surface was covered with quagmires. It was also inhabited by the venomous Moxolon Swamp Viper. After he was captured, Androvax was sent to this planet. (TV: The Vault of Secrets)
