There is whole discussion about Tuna fish and why it’s not a problem what they eat and that it stays in their stomach, cuz of how long it takes them to bring up the nets and that it stomach is digesting its contents way after it has been caught enough time to digest everything. So Tuna shouldn’t be a problem LH”D.
Using nets to catch tuna is somewhat of a modern innovation, before the 1960s the majority of tuna was caught by hook and line. Even today not all tuna is caught in nets.