Sam Bankman-Fried, convicted of fraud in the meltdown of FTX, has traded in crypto for a new currency: mackerel.

The fallen crypto king, who is cooling his heels at Brooklyn’s Metropolitan Detention Center while he awaits sentencing for seven felony offenses, has learned the fundamentals of prison economics while sharing a dormitory with a former Honduran president awaiting criminal trial and a recently convicted former top cop of Mexico, people familiar with the matter said.