Casson Trenor, Senior Markets Campaigner with Greenpeace USA, spearheads the organization’s efforts to hold restaurants and supermarkets accountable for their seafood sustainability practices and to help educate the public about the global fisheries crisis. He is the author of Sustainable Sushi: A Guide to Saving the Oceans One Bite at a Time, a full-color book that profiles dozens of the most common fish and shellfish encountered at the sushi bar, details where and how they are harvested, and discusses their environmental status in plain and accessible language.

Trenor is a frequent commentator on sustainable seafood issues and has appeared in regional and national publications, including NPR, the New York Times, Los Angeles Times, Seattle Times, Tampa Tribune, San Francisco Chronicle, and Edible San Francisco. He is also the subject of an extensive multi-part feature story in the Japanese newspaper Kochi Shimbun. 

In October 2009, Trenor was named a "Hero of the Environment" by Time Magazine.Trenor speaks five languages, has traveled to over fifty countries, and holds a Master’s degree in International Environmental Policy from the Monterey Institute of International Studies. In February 2008, he and two partners opened Tataki Sushi and Sake Bar, the world’s first sustainable sushi restaurant. He was born in Washington State and currently resides in San Francisco.