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12 Species Case Studies
Fig. 12.53 ( a ) Moorish idols a in spawning aggregation swimming just above the reef. ( b ) When
aggregations of Moorish idols swim in one direction, they move in unison. ( c ) Spawning aggregations occur amongst populations of many predators, include grey reef sharks ( Carcharhinus
amblyrhinchus ), seen here in the background (Photos: Patrick L. Colin)