The book "Reef Fish Spawning Aggregations: Biology, Research and Management" offers a comprehensive and practical examination of the spawning aggregations of reef fish. These fascinating yet poorly understood natural phenomena demonstrate how fish come together in large groups at specific times and locations to reproduce. The gatherings can range from small groups to tens of thousands of individuals and are often the target of intense seasonal fishing. Due to their predictability and the fact that many commercially important fish species form them, these aggregations are particularly vulnerable to overfishing. The book highlights the biological foundations, research, and management of these aggregations, providing valuable insights into the protection and conservation of these important ecosystems. It also identifies essential data gaps and questions that are crucial for understanding and sustainably managing these fish stocks.