Senator John Strong Dunkelberg is a Zootopian Dunkleosteus terrelli from the underground land of Dinosica. He is the aggressive leader of the sea sections of the Devonian Sector of the Paleozoic District, finding the very idea of danger all over Dinosica from the stereotypes of all prehistoric animals being scary enraging, oftentimes ending up proving it right, especially to his assistant Titanicthys Assistant Taito, and secretary Coccosteus Secretary Coccs.

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