John Rafferty of Encyclopaedia Britannica discusses the Atlantic and Pacific bluefin, two species of tunas that are threatened by overfishing. This is the third part of the Postcards from the 6th Mass Extinction audio series. 

Postcards from the Sixth Mass Extinction, 3rd program. John Rafferty, speaker & writer; J.E. Luebering, sr. editor; Jisun Kim, content advisor; Kurt Heintz, producer

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.