The same thing happens here in Romania when it comes to potato harvesting, of all things. The people doing it are taking advantage of poor people from a few counties away, desperate to find jobs, oftentimes this desperate people bringing their kids with them.

Here's [1] an example from a few years ago, article in Romanian but that photo of the "accommodation" provided should be enough. Eight kids were also caught up in it all.

[1] https://click.ro/actualitate/national/ei-tineau-opt-copii-ca...

Generally, vegetarian/vegan requires less raw inputs, so less labor and less chance for slavery.

Buying produced food from sources that have rule of law is more direct, but harder.

I believe the parent comment agree with you and is mentioning he is vegetarians so that answers focus on why fishing makes it's easy for slavery given there are abuses in agricultures as well.

Thank to this, he was able to ask a question that was uneasy to ask, and get the answer about international waters, making it an interesting addition to the whole thread.