‘Fishless fish’: the next big trend in the seafood industry

Alternative seafood' is having a moment, with the rise of companies like BlueNalu and Wildtype, which has the backing of Leonardo DiCaprio

In the middle of San Francisco, there's a pilot production plant for Wildtype, one of a handful of cell-cultivated seafood companies in the US. Inside, it's growing sushi-grade coho salmon in tanks similar to those found in breweries - no fishing or farming required.

Cultivation starts by taking a small sample from a living fish species. Cells then multiply as they would in nature in the large vessels and eventually become fatty and lean parts of a fish fillet.