Increasing harvests of such fish could also drive prices lower, making the industry less profitable in the long run, the Pew Charitable Trusts said in a report issued Tuesday.

The report, Netting Billions 2020: A Global Tuna Valuation, put the market value of seven tuna species including bluefin at $40.8 billion in 2018. Despite increased catches, that was a decrease from $41.6 billion in 2012.

“Just because increasing catch is sustainable does not mean it is always the right thing to do,” said Grantly Galland, an officer in Pew’s international fisheries team.

Prices for most species of tuna have fallen due to oversupply of caught fish, he said.