Is the legendary island that sank in Atlantic known as Atlantis or Nautilus?

The legendary island that sank in the Atlantic is known as Atlantis.

The story of Atlantis was mentioned by the Greek philosopher Plato and has captivated people's imaginations for centuries. Plato described Atlantis as a powerful and advanced civilization that existed beyond the Pillars of Hercules (thought to be the Strait of Gibraltar) before sinking beneath the waves in a catastrophe. While it remains a popular subject of folklore and speculation, there is no definitive historical or archaeological evidence to prove the actual existence of Atlantis.