Watch Out — It’s a Swarm of Sardines!The Rainforest Site
Each year, billions of sardines swim up the coast of South Africa in one of the largest fish migrations on earth. But sardines aren’t very high on the food chain, so when they travel in such large groups the fish tend to attract a lot of attention. But why do they travel in such large groups? It’s a simple concept of probability — traveling in a larger group of sardines will greatly increase the chance of survival for an individual sardine. Pretty neat, right?
However, these little fingerlings do have another advantage besides numbers — a pressure sense that allows them to track the movements of their nearest counterpart, and gives large schools of sardines the ability to move in graceful synchrony.
Watch the video to see an incredible swarm of sardines as they work together and try to evade a variety of hungry predators.