The Hooloovoo resemble a super-intelligent shade of the colour blue. One was seen in a prism for Zaphod Beeblebrox's address upon stealing the Heart of Gold. On certain special occasions, such as the aforementioned Presidential event, they will be refracted into a free-standing prism.

Their homeworld is a collection of asteroids in one of the far flung arms of the galaxy. They are able to "read" material like books by occupying prisms, including a special edition of the The Guide.[1]

The Hooloovoo demonstrate their dissatisfaction with the Universe by holding their breath until they turn a deep purple.[2]


The Hooloovoo appeared in:


  • It is ambiguous whether the Hooloovoo are superintelligent compared to other galactic inhabitants, or only by comparison to other shades of blue, which they resemble.

Cultural referencesEdit

One of their race is pointed out by The Doctor in the 2013 Doctor Who episode "The Rings of Akhaten".

In Season 3 of King of the Nerds the blue team named themselves "House Hooloovoo".

There is a software company Hooloovoo from Belgrade, Serbia, uses this and many references from the book to attract software developers with a similar sense of humour.

The name of a debut album by a Rhode Island band "Young Neil and the Vipers" released in 1990.