The seas and oceans of our planet are vast ecosystems filled with a huge variety of animals. This doesn't stop these creatures from becoming threatened due to global warming and human actions such as commercial fishing and pollution. This volume discusses the spectrum of threatened species and how sea creatures fit into it. Readers see the devastating results of human actions, including dead coral and an extinct species of seal. However, the text focuses more on the animals at risk and what we can do to help them. The book ends with a success story of an animal coming back from the brink of extinction. Charts, maps, and sidebars make this the perfect guide for young conservationists!