"Here's a map of the world with the water level reduced by a little over 300 ft."
interesting map.
Australia is still isolated.
Red Sea is a lake.
Gibraltar is open.
Bosporus is closed.
But the map assumes the Black Sea is filled to then-sea level. It might have been dry (or lower) at the time.
I 'see' Gilbrater closed and the Mediterranean sectioned in at least in two places.