N.J. Stat. Ann. § 23:3-62

"Fishing preserve waters" means any artificial or man-made body of water, not to exceed 10 acres in size, lying wholly within the boundaries of lands owned by one individual, operated for the purpose of permitting the owner to provide fishing facilities to fishermen. Such waters shall not include natural streams, natural ponds or waters impounded by the damming of natural streams. The sources of water for such ponds shall be limited to surface runoff, natural springs or driven wells. Any outfall from the "fishing preserve waters" must be so constructed as to prevent the passage of fish from or to that body of water.