Trammel nets are a type of fishing net that is composed of three layers - an inner taut net, a looser middle net, and an outer taut net. This type of net is used to catch fish by entrapping them between the layers. Other synonyms for a trammel net include drift net, gill net, tangle net, and curtain net. These forms of nets are commonly used in fishing, and each has its unique advantages depending on the type of fish being targeted and the specific fishing location. The most suitable type of net must be chosen to ensure a successful and sustainable fishing practice.