The Greatest Shoal on Earth

Every year during the winter months of June and Julythat when they create shoals more than a million
in South Africa, one of natures greatest events takestrong that predators are soon on their trail. Under the
place. Millions of little sardines abandon their spawningwater, the shoals of sardine are mercilessly pursued
waters of the Agulhas Bank located in the southernby sharks, tuna, dolphin and even whales. As they
waters of South Africa where the cold Atlantic Oceancome under attack, the little fish form defensive
and warm Indian Ocean meet. It is the coming togetherbait-balls but it is little protection as time and again, the
of these two oceans that make the waters idealpredators hit the bait-balls, taking a few of the little fish
spawning grounds as they are rich in nutrients.with each attack.
The exact reasons why the sardine migrate awayThere are so many sardines and predators in the
from such nutrient rich waters aren't known but theywater during the Sardine Run that the Natal Shark
thrive in water temperatures of around 20 Celsius. AsBoard remove the shark nets that usually protect the
the winter waters of the Eastern Cape and KwaZulubeaches to prevent the sharks, dolphins and other
Natal cool, it is believed the sardines take advantagelarge sea creatures from getting caught up and dying.
of their expanding territory and head northwards upAs the shoals come under attack, they are forced into
the South Africa coast. Measuring up to around 9shallower waters where they start to come under
inches in length, these little fish travel in massive shoalsattack from the air as the sardine come within diving
clearly visible from the surface of the ocean. Thedepth of gannets who join in the bountiful feast that
shoals can be several kilometres long and up to anature has provided. Humans get in on the act too. As
kilometre wide so in terms on numbers, they easily rivalthe shoals move to try to escape the caravan of
Africa's other famous migration of the wildebeest aspredators, they move into shallow waters small fishing
they head north from the Serengeti into the Masaiboats move in the fish are literally dragged ashore by
Mara.crowds of waiting people. As well as the fishing nets
The Sardine Run is a big event of the Eastern Capeall sorts of containers are used to scoop up the
and KwaZulu Natal. As sardines are pretty much atsardines by people trying to gather as many as they
the bottom of the food chain, it isn't much of a surprisecan carry.