#Knowledge Round 6: Ocean depths

While deep-sea trenches are usually elongated trenches, a Sea low a rather small lake area that lies partly in such a channel. Some of the deepest places are:

• Challenger Deep in the Mariana Trench (10,984 m; Pacific Ocean)
• Milwaukee Deep in the Puerto Rico Trench (8,376 m; Atlantic Ocean)
• Diamantina Fracture Zone (7099 m; Indian Ocean)
• Molloy Deep (5,669 m; Arctic Ocean)
• Calypso Deep (5,267 m; Mediterranean Sea)
• Norwegian Gully (725 m, North Sea)
• Landsort Low (459 m; Baltic Sea)