Who's Killer Shark I?

Who's This? A Blackhawk villain (Nazi). The facts: Okay, the way Who's Who did it is confusing, so let me clarify. When Blackhawk was being published by Quality Comics in the post-War Golden Age, a villain called Killer Shark showed up. Much later, in the 80s, under DC's control, a different Killer Shark was introduced. In publishing chronology - and this is the way Kyle Baker drew it - the…