Dave the DiverChineseHelicoprion
Overview
Helicoprion is a hydrothermal fish in Dave the Diver. It was believed this creature went extinct 200 million years ago, but appears at least one survived, having been frozen in ice until the ice thawed out.
Notes
*Oddly, while it's encountered in a glacial cave, it's marked in Marinca as being a Hydrothermal Vents fish. Furthermore, other unique fish found in the same cave are under the Glacier Zone.