The idea of a flood in the area of the black sea is not new. There is evidence that the black sea was once a fresh water lake with civilizations on it's shores. When the ice melted and the Mediterranean sea rose salt water flooded into the region of the lake turning the water into salt water. The fresh water crustaceans died and the water level rose creating the Black Sea. There is evidence of fresh water crustaceans all dying out simultaneously in the Black Sea.
There is the idea that a farmer built a raft or boat to save his animals from the rising water. Not 2 of every species in the world.