Here is a herring boat Transvac. It is used to suck the herring out of the holds of the huge boats. A vacuum is created between the fish and salt water and they get sucked out of the boat and onto the dock. Thse transvac units are sometimes mounted on trailers and transported up and down the coast as the herring migrate up and down. Some are mounted on the boats themselves. Bottom line is that this fishing industry innovation has saved a ridiculous amount of work when fishermen used to have to bale the fish out using dip nets and winches and a whole lot of back work.
Herring Boat Transvac- Giant Fish Vacuum, originally uploaded by captjoe06.
Good Morning Gloucester 