How deep do creatures swim? How deep have humans explored with submarines? Come explore the deepest seas on Earth with Neal Agarwal's flash simulation.

While you're exploring that, here are links to two short videos on sea life as it exists in near ideal conditions such as the Great Barrier Reef (with thanks to National Geographic), or else in some of the most difficult sea conditions to be found on Earth, such as life huddled around hydrothermal vents poking out from the very deepest ocean floors where no sunlight light can reach. (With further thanks to the US National Oceanic and Atmospheric Administration.)