Nets usually have floats on the top line and generally weights on the base line.
Many types of nets can be combined into a single net, for example, combined gill nets, used either alone or, as customary, in a large number placed in line.
Nets can be fixed or can be anchored at the bottom.
Gill nets sets are often folded on the deck, or in some cases kept on drums.
Target species are pelagic, demersal and benthic species.
Depending on the design, the relationship between ballasting and buoyancy, these nets may be used for fishing near the surface of water, in inland waters or in marine waters.