Product Overview Bottom trawling Pelagic trawling Deep sea trawling All custom requires and accessories about the trawl nets are available from us. Description Bottom trawling requires strong quality nettings The construction of a bottom trawl is like a cone-shaped net, which is towed on the bottom (towed by one or two boats). The trawl has a body ending in a cod end, which keeps the catch. Typically the trawl net has two lateral wings extending forward from the opening. The opening of the trawl is bordered using headlines. A trawl like this is designed to catch fish species living on the bottom of the ocean or near the bottom of the ocean. This could be haddock, cod, flounder, rockfish, sole, rockfish, shrimp, squid and octopus. You can divide bottom trawls into three different categories, based in how the horizontal opening is maintained. The three types are: beam trawls, bottom otter trawls, and bottom pair trawls. Pelagic trawling in the mid- and surface water Just like bottom trawls are pelagic trawls cone-shaped and have a closed cod end to hold the catch, but typically pelagic trawls are much larger compared with bottom trawls. Pelagic trawls are designed to catch fish in the mid- and surface water. Species living here are for example herring, hoki, and mackerel. When trawling fishing, acoustic technology is used to locate the position and the depth of the target fish and then the path of the boat and trawls are adjusted accordingly. The most common method for pelagic trawling is single-boat trawling, where the horizontal spread of the net is provided by trawl doors (trawl doors exist in a range of sizes and shapes). When pair-trawling two boats are used and here is the horizontal spread of the net provided by the boats.