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China¡¯s Yangtze river dolphin (Lipotes vexillifer), was declared likely to be extinct in?2006, due to threats in the wild such as habitat loss, entanglement in fishing gear and ship strikes, which?were not effectively dealt with using the management tools available prior to that time. Mexico¡¯s vaquita?(Phocoena sinus), a porpoise found only in the Upper Gulf of California, will become extinct in the near?future if the illegal fishery to obtain fish swim bladders for illicit international markets is not eliminated?very soon. In both of these cases, it took only a short time for the population?to decrease from hundreds to tens of animals. This highlights the urgency of gaining information and?taking action to anticipate and prevent such rapid declines in other threatened species and populations?of small cetaceans. A workshop, ¡°Ex situ Options for Cetacean Conservation¡± (ESOCC) was held in Nuremberg, Germany,?14-18 December 2018, to start preparing such actions. This report contains the executive summary of the main report of the 2018 workshop in English, French, German, Japanese, Mandarin Chinese, Portuguese and Spanish.