Upwelling in Arraial do Cabo: what it is and why it benefits the ocean.
Upwelling is a vertical current that brings deep ocean water toward the surface. Horizontal currents driven by wind push this deeper water upward. It happens in relatively few places around the world, and Arraial do Cabo is one of them.
Its greatest gift is the nutrients it brings from the depths. They feed the marine food web and help life flourish. That's why Arraial's waters are so full of fish.
Read more about upwelling on Wikipedia.