The Sea of Azov is much less picturesque. Syvash Bay with bitter and very salty waters forms part of the sea. There are wonderful sandy beaches on its northern coast and it is rich in fish life. In the winter the Sea of Azov freezes over. It is small, and the world's most shallow sea, its average depth being 5-7m.
Rivers are the principal part of Ukraine's water resources.
Ukraine has a wealth of rivers. More than a 100 of them are longer than 100km. The largest rivers are the Dnipro, Dnister, Danube, Southern Buh, Siversky Donets and Tysa. Most of Ukraine's rivers belong to the Black and Azov Sea basins. Ukraine's rivers are predominantly flat, with winding channels.