When serious scientists with huge beards aren't looking, I jocularly refer to these fossils as my alien goldfish. Picture the scene: the giant spaceship is parked on a wide beach, and kicking pebbles Commodore Grafnik is in a filthy mood. Yet another planet with hundreds of millions of years to go before intelligence evolves, not even at the zorkquaan stage, for Threga's sake! And as for his pet vlantans!! Purchased at huge expense, all they do is feed voraciously and then fall asleep. Still fuming, Grafnik carries the bowl down to the lagoon edge and (contrary to every regulation in the AIPC [Access to Inhabited Planets Code]) tips the vlantans out. They dart away and several months later enter the fossil record of a planet where they have no right to be.