The best replacement for red sea is dead sea.

The best alternatives to red sea are rated as following:
★★★★★  dead sea
★★★★★  sea of reeds
★★★★★  reed sea
★★  mediterranean sea
★  reef crystals
★  jordan river
★  mediterranean
  persian gulf
  instant ocean

Your alternative for red sea is not listed? Suggest!
Speaking about red sea, one probably shouldn't forget about mediterranean sea.

Other search terms related to red sea and their ratings are:
★★★★★ mediterranean sea
You have in mind a companion for red sea and it is not yet here? Propose!



Google Trends

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red sea
dead sea
sea of reeds