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Collective motion patterns in fish schools. Individuals’ interactions give rise to a variety of dynamical structures that can be (a) poorly or (b) highly (Copyright © agasfer, www.flickr.com, with permission) polarized (Copyright © breic, www.flickr.com, with permission). Other configurations of fish schooling include milling (c) (Copyright © Tammy Peluso) and bait ball (d) structures (Copyright © Barry Fackler with permission).
