All those ships? The dock itself at times used to be so full you could walk from one side to the other just crossing ships, with others waiting outside the lock gates for their chance to land their catches.
But think on, 200 steam trawlers each with a crew between 6 and 12 men, thats a lot of lost jobs. But not just them, what about the coal miners whose coal was needed for fuel - lost jobs. What about the bobbers (fish landers/unloaders) - lost jobs. The wholesalers and then the retailers of the fish - lost jobs. Then move on to the peripherals, the net makers, the riggers, the painters, the engineers.
200 ships maybe, but thousands of jobs depended on them and were lost when the fishing fleet was consigned to history. Fish isn't landed at Hull any more the industry has all but vanished.