A fishing trawler is a type of commercial fishing vessel designed to catch fish and other seafood. It uses large nets, called trawl nets, which are dragged through the water to capture fish. Trawlers can operate in various waters, from coastal areas to the open ocean, and are equipped with technology to locate fish more efficiently. These boats come in different sizes and can be powered by engines or sails. Some fishing trawlers are specifically designed for deep-sea fishing, while others focus on inshore fishing. The catch from trawlers often includes species like cod, shrimp, and herring.