Besides the dreaded thought of being eaten alive by sharks which has been on top of every swimmer’s mind while swimming in the open sea, there is a whole bunch of other weird sea creatures that have topped this list of the world’s scariest fish if these weirdo’s can be called fish. Every single one featured has earned its place on this list of the top 6 scariest fish in the world living in oceans, seas or rivers.The number one contender on the top 6 frightening fish in the world is the viper fish. This denizen of the sea with a mouth full of razor-sharp teeth is one of the most fearsome predators in the deep-sea. The teeth of a viper fish are not restricted to its mouth and curve all the way to top of the fish’s head.The dorsal spine of the fierce-looking creature is long and the tip contains a photo phore, a light producing area. Prey gets attracted by the flashing of the photo pore while the viper fish stays motion less in the water.