It's a weird one, I work for/with the skipper and tender, but we're paid directly by the buyer. The buyers have our bank details to pay us directly, based on the daily catch logs provided by us alongside our catch. The vessel, nor the individuals on it, is not a company by any measure, it is three individually self-employed individuals working on a boat that someone owns (sometimes the skipper, sometimes someone else).
So I think you're thinking that the buyer buys the fish, pays the owner of the vessel/company, who then pays us?
It's more like the company buys the fish and pays the crew directly, kinda blurs the line between who the company is... I have letters of reference and catch logs from the boats I worked on and I have records of employment and (hopefully soon) letters of reference from the buyers I worked for...