N.J. Stat. § 23:9-14
No person shall use eelpots and fyke nets, each without wings, in the Delaware river, above or below Trenton falls, during any period which shall be prescribed in the State Fish and Game Code, or if no such period is so prescribed then from June 1 to July 1, in each year, both dates inclusive, but it shall be lawful to use eelpots and fyke nets, each without wings, during any period which shall be prescribed in the State Fish and Game Code, or if no such period is so prescribed then from July 1 to May 31, both dates inclusive, in each year, for the purpose of catching carp, catfish, eels and suckers only. All other species of fish which may be caught in said nets must be returned unharmed immediately to the waters from which taken; provided, that the entrance of said eelpot or fyke net shall not be more than of such diameter and the outside diameter thereof shall not be more than of such dimensions as shall be prescribed in the State Fish and Game Code, or if no such dimensions are so prescribed then that the entrance of said eelpot or fyke net shall not be more than 6 inches in diameter and the outside diameter not more than 30 inches. Any person violating any of the provisions of this section shall be subject to a fine of $20.00, together with a forfeiture of all nets, boats and other appliances used.
N.J.S. § 23:9-14