The researchers invited 662 hadal amphipod (Hirondellea gigas), a tiny crustacean that moves side to side between deep-sea trenches, showing how invertebrates travel across the ocean floor.

makes up the average depth of the ocean floor. However, this estimate does not consider the deep pits underwater called trenches that deem the ocean deeper. Now, considering the deepest trench ...

The Ocean’s new website ... The Hadopelagic zone delineates the deepest trenches in the sea, from around 20,000 feet deep down to the sea floor. Here’s a nifty diagram from Wikipedia that explains it ...

Heirtzler, J. R., Dickinson, G. O., Herron, E. M., Pitman, III, W. C., and Le Pichon, X., J. Geophys. Res., 73, 2119 (1968).

Massive quantities of microplastics lie on the deep ocean floor 500 kilometers off the Boso ... more than 9,000 meters deep along a trench off the Boso Peninsula, and nearly 6,000 meters deep ...