Oceans and seas

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Across
  1. 2. where charybdis and scylla lurk, alas great love cannot be broken by whirl or reef.
  2. 5. child of Volga, even bound in stone the sea is untamed
  3. 6. arm of the Aegean, guarded by Troy,
  4. 7. beneath the sunlight and above midnight, within the confines lies waters unbridled and beasts unknown
Down
  1. 1. locked by land, dead lake lasts, sea of Sodom , these crystals born and the lake given name.
  2. 3. the ring around the world, the southern Colossal deluge
  3. 4. like her namesake she too grows stronger, now the second in time the largest.