Board Thread:Sly Cooper series discussion/@comment-26866486-20130716174002/@comment-5876466-20130718021901

I doubt that the fire slugs were employed by Clockwerk. My theory is that the fire slugs were native to the volcano and Clockwerk noticed their aggressive behavior. Since he was airborne and the creatures would never be able to harm him, he let them be and they acted as a form of security for his lair, alongside the robo-falcons (which were created by Clockwerk). Kind of like the giant mosquitos and spiders in Haiti -- creatures native to the area that were just defending their territory, not employed like the rest of the sapient guard species.