Felix is a friends character in a sci fi RP I ran,
Felix belongs to an alien species called 'Dargonese' who specialize in genetic manipulation, all their machines, ships etc are all biological and alive, in fact their society recognizes all sentient, created or natural birthed as being equal and having equal status in their society. (Felix's father was a 2km long Battleship... its a long story..)
That green dinosaur like creature next to him is one of his 'experiments' called a Fluffel.
In an attempt to solve their ship's missile ammunition problem, he decided to create a living, low intelligence, easy to breed missile.
The experiment went a little bit wrong, he did indeed make an amazingly accurate anti ship missile creature, unfortunately instead of a stupid critter that pretty much slept until needed, the creature came in a range of spectacular colors with the intelligence of a border collie, they are also incredibly friendly with a loyalty to their chosen master that would make any general proud, they are also good with children.
It did solve the ammunition problem, as the ships crew never had the heart to use the new missiles and instead swapped to an all gun armament arrangement.
In short they were the perfect companion pet, as long as you could over look the quarter kiloton yield they came with, oh, and you never, EVER, told them to 'go fetch'.