A trawler is a type of fishing vessel designed to catch fish by dragging a large net, called a trawl, through the water. These boats can vary in size and are often equipped with powerful engines to navigate through different sea conditions. Trawlers are commonly used in commercial fishing to harvest various species, including cod, shrimp, and herring. Trawlers can be classified into two main types: stern trawlers, which have the net deployed from the back, and side trawlers, which have the net deployed from the side. The design of a trawler allows for efficient fishing over large areas, making it a vital tool in the fishing industry.