Deep in the South Pacific Ocean, far to the east of the sun-kissed Tahitian beaches so popular on Instagram, is a patch of water they call a biological desert. That is the formal scientific term.
The South Pacific Gyre has the lowest surface chlorophyll concentration of any ocean on earth, and the clearest water in the world. It is called ultra-oligotrophic, meaning so nutrient-starved that almost nothing can grow there. Phytoplankton only exist below about a hundred meters, because the surface water is too sterile to support them. The food chain starts in deep water, not at the surface, so you can sail for days through it and see no birds, catch no fish, and begin to understand why the old charts left this part of the world blank. It is blank.
