Jovian Snake

Jovian Snakes are a species of wildlife which inhabits the swamps of Jupiter. Their bite delivers a debilitating agent which, while not fatal, causes the victim to gradually shrink in size. The only known cure consists of powdered Loomi pebbles, which are carried around by Loomis.

Appearances

 * Space Patrol, s01e05, "The Shrinking Spaceman" (1963)