The blarp was an alien creature , described in the script and some spinoff novels as a "lizard monkey" encountered by the crew of the Jupiter 2 in the 1998 Lost in Space movie. This creature was first discovered by the crew on the Proteus , apparently the child of aliens who encountered the ship in deep space . this backstory is implied in the script, where the parents actually appear, but is left unclear in the actual film. eventually he was rescued from the space spiders and became Penny's pet and companion.