Around the World Under the Sea is a 1966 science fiction film directed by Andrew Marton and starring Lloyd Bridges, with Marshall Thompson, Shirley Eaton, Gary Merrill, and David McCallum.

It follows the adventures of a crew of the deep-diving nuclear-powered civilian research submarine Hydronaut making a submerged circumnavigation of the world to plant monitoring sensors on the ocean floor that will help scientists better predict impending earthquakes.

After the destruction of much of coastal Turkey, a United States led crew of experts from around the world pilots a five-person submarine, traveling the world oceans, planting sensors on the ocean floor to warn scientists of any impending earthquakes.

In addition, the crew often does not get along especially when a crewmember wants to use the submarine to reach a shipwreck that holds a safe containing diamonds and pearls.

Moria gave the film 2 and 1/2 stars, praising the underwater camera work but finding the story lacking.