No, this isn't a prehistoric, extinct fish, but it is freaking looking, and extremely rare to see washed up on shore.
What you are looking is a deep sea Pacific footballfish. It's a species of anglerfish that are more commonly found at sea depths of more than 3,000 feet below the surface.
A beachgoer in Newport Beach found the fish washed ashore during a morning stroll Fridaymorning. The long dorsal fin extends in the front of the fish's mouth and has a phosphorescent bulb on the end which can emit light to attract unsuspecting prey closer to it.