The most important fishing grounds of the world are found in the regions where

The world's most significant fishing grounds are located where warm and cold oceanic currents converge [3]. This mixing process is vital for marine productivity as it replenishes oxygen levels and facilitates the growth of phytoplankton, which serves as the primary food source for fish populations [2]. Cold currents often trigger upwelling, bringing nutrient-rich waters (containing nitrates and phosphates) from the deep ocean to the sunlit surface layers. These nutrients fuel massive plankton blooms, creating a robust base for the marine food web. Notable examples of such productive zones include the Grand Banks of Newfoundland, where the warm Gulf Stream meets the cold Labrador Current, and the waters off the North-Eastern coast of Japan, where the Kuroshio and Oyashio currents converge [3]. These regions provide ideal temperature conditions and abundant food, supporting thriving commercial fishing industries [3].

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 32: Ocean Movements Ocean Currents And Tides > Fishing > p. 497
2. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 30: Climatic Regions > Fishing Off Newfoundland > p. 463
3. [2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 13: Movements of Ocean Water > Effects of Ocean Currents > p. 112