& N bsp; is used from the ground or aboard a boat tracking the bottom in areas of sand and gravel. Dredgers: Unlike the tools so far described are handled by hand, the dredges are dragged along the bottom towed by boats more power through a corporal. & N bsp; An extended network is mounted on a metal frame that takes different forms, rectangular, oval, semicircular, etc.. From the front of the frame winds dying out in the same ring that the rope becomes firm. The sector lower rectum, that is, which acts directly on the bottom teeth can carry material differs according to species to capture and the nature of the fund. Generally engaged in the capture of molluscs crawling between two and five dredges at the same time.

Currently used round by boat equipped with hydraulic dredges, which means this, that after starting from the bottom molluscs elevate them to the appropriate carriers mediantra enbarcacion (what is commonly known as a sucker). Fitor – Pisgah – Trident: they are very simple instruments belonging to the group you work so hurtful. Still used in shallow waters of bays and harbors to collect bottom species such as leagues, plaice, etc and occasionally cephalopods, cuttlefish, octopus and so on. Spears: stitching elements are handled throwing. Based on their mode of application and generally can be said to differ from the above that these are released don the help of mechanical devices. ANZULEO & n bsp; is one of the instruments oldest known since.