Meshes are uniform in size and shape and therefore highly selective for a particular size class of fish. Fish become snagged by their gill opercula, fins or scales as they try to swim through the net. Gill net can be set at different depth, from the bottom to the surface of the water column. Trammel net differ from gill net because they incorporate three layers of netting: an inner small meshed net between layers of large meshed net. Trammel net is usually set on the seabed. In addition, a combination of the two types of nets is used by vessels of Chioggia’s fleet. The net is composed by a trammel net on the upper part, and a gill net on the lower one.
Two types of traps are used by vessels of Chioggia’s fleet. A first type, called “nasse”, consist in a trap composed by one chamber of non-return. These traps are set in lines, formed by approximately 25 traps, anchored to the bottom, in coastal waters, targeting mainly cuttlefish during their breeding season. A different type of traps, called locally “cogolli”, is constituted by several chambers of non-return. Traps are attached to a wall of net that directs the fish to the entrance of the trap. This type of traps is used inside the lagoon, targeting different species.