Is it a keeper? A white marlin is a keeper today if it measures at least 66 inches, with no daily limit.
White Marlin size limit, season and daily limit
Where
Season
Size limit
Daily limit
State waters
Open year-round
66 inch minimum
No daily limit
Notes
Atlantic HMS Angling Permit required for private vessels in federal waters; non-retained HMS must be released without removing from the water. hmspermits.noaa.gov / (888) 872-8862.
Exact DNREC wording
Season
Open Year-RoundAll Atlantic Highly Migratory Species (Atlantic tunas, sharks, swordfish and billfish) not retained must be immediately released to ensure the maximum probability of survival, without removing the fish from the water.There is an annual U.S. landings limit of 250 Atlantic Blue Marlin, White Marlin, andRoundscale Spearfish (combined). Landings updates and seasonal closures are posted under “What's New...” at https://hmspermits.noaa.gov/*Special permit required - All private vessel owners/operators recreationally fishing for and/or retaining regulated Atlantic Highly Migratory Species (Atlantic tunas, sharks, swordfish and billfish) for personal use in the Atlantic Ocean must obtain an Atlantic Highly Migratory Species (HMS) Angling Permit. Further limits and restrictions apply. Consult https://hmspermits.noaa.gov/ or call toll free (888) 872-8862 for specific information and permits.
Size
66 inch minimum (measured from the tip of the lower jaw to the tail fork)
The white marlin, also known as Atlantic white marlin, marlin, skilligalee, is a species of billfish that lives in the epipelagic zone of the tropical and subtropical Atlantic Ocean. They are found between the latitudes of 45° N and 45° S in waters deeper than 100 m (330 ft). Even though white marlin are found in bodies of water that are deeper than 100 m they tend to stay near the surface. White marlin have been found near banks, shoals, and canyons, but they are not limited to those locations. They prefer warm surface temperatures greater than 22 °C (72 °F).