吃素的鲨鱼 is a documentary that explores the ethics and impacts of veganism on the sustainability of the oceans. The film follows several researchers and scientists who are investigating the effects of a vegan lifestyle on the ocean’s coral reefs, fish stocks, and other aquatic lifeforms. It also looks into the various benefits and effects that a vegan diet can have on the planet’s environment, both above and below the waves. The documentary ultimately seeks to answer the question of whether a vegan lifestyle is truly sustainable for the health of the oceans.