When ocean currents and winds combine, nutrients rise up from the depths in a process called upwelling. The plankton follow the nutrients, and predators follow the plankton. This results in a feeding frenzy at all links of the food chain. Most of the seafood we eat is caught at these upwelling sites.

Key Facts In This Video

  1. Most plankton can't fight the ocean's currents, and drift along with them. 00:39

  2. Some types of plankton remain small drifters, whereas others grow into different forms of marine life, including crustaceans. 01:34

  3. When wind and currents carry nutrients up toward the ocean surface, plankton follow, drawing hordes of larger predators. 01:55

Written by Curiosity Staff June 4, 2015