Dictionary of Ichthyology
trawl = a bag-shaped net towed behind a ship either along the sea floor or in midwater, having a buoyed head rope and a weighted foot rope to keep the net mouth open. It may be towed by one or two ships (here by sail in the nineteenth century).
|From Whymper's "The Fisheries of the World", 1883. Photograph by Brian W. Coad.|