Too Many Deadlands
All kinds of strange creatures emerged when California fell into the sea. One of the biggest is the California Maze dragon. These tremendous critters attack both ships hauling ore and prospectors mining the canyon walls of the Maze.
Unlike most abominations, Maze dragons are known and accepted as ordinary creatures. Most folks just figure they somehow came with the Great Quake. The Chinese warlords of the area started calling them dragons, and the name stuck.