A marine life trap that is used primarily for trapping crustaceans, such as crabs and lobsters, which trap includes a base with an upstanding center post on which a top portion is slidably mounted, with a downwardly extending perimeter net, the top portion being hollow and having an opening in the bottom...http://www.google.es/patents/US4831774?utm_source=gb-gplus-sharePatente US4831774 - Marine life trap
