The totoaba or totuava (Totoaba macdonaldi) is a marine fish, the largest member of the drum family Sciaenidae, that is endemic to the Gulf of California in Mexico. It is the only species in the genus Totoaba. Formerly abundant and subject to an intensive fishery, the totoaba has become rare, and is listed on CITES, the IUCN Red List of Threatened Species, and the Endangered Species Act (ESA).