There is a second Chicago fish company worth knowing about, and it explains most of this page. Fortune Fish and Gourmet's own history page says its founder, Sean O'Scannlain, began his seafood career at the Chicago Fish House, which it describes as now defunct and, at its peak, the nation's largest seafood distributor. He left in 1995, and started Fortune in June 2001. So the largest seafood distributor in the country was a Chicago business, and today its domain is a parked page.
Fortune is what grew in its place, and Fortune is no longer independent either. Investcorp announced on 12 February 2020 that it had completed the recapitalization of Fortune International, the company behind Fortune Fish and Gourmet, and it lists the Bensenville business in its portfolio. That is the same concentration the homepage tracks through Sysco's pending purchase of Restaurant Depot, just further along.
None of that is a reason to avoid Fortune, which is a serious supplier. It is a reason to know who you are buying from, because ownership shows up later in the things operators actually notice: which items stay in the catalogue, how much a rep can flex on price, and whether the answer to an unusual request is yes. It is also why the smaller houses here are worth keeping in the mix. Wabash has been family run since 1989, The Seafood Merchants has carried hard to find items as stated policy since 1981, and The Fish Guy has supplied restaurants quietly since 1997. Those are the accounts that say yes to a small order of something odd, and they are the first to disappear when nobody uses them.