Species

White marlin

White marlin, the smaller marlin of the Atlantic: acrobatic, often found along canyons and edges off the US East Coast, and Ocean City, Maryland, calls itself the White Marlin Capital of the World.

Kajikia albida

Photo: Dominic Sherony, Wikimedia Commons, CC BY-SA 4.0, adjusted to 3:2

Spawning: Migrates to subtropical waters to spawn, peak in early summer, at 20 to 29 °C (FishBase); German Wikipedia gives 24 to 29 °C. Known spawning grounds: Gulf of Mexico, Mona Passage, southwest of Bermuda and northwest of Grand Bahama; a female lays 190,000 to 586,000 eggs (Wikipedia).
Typical method: Trolling baitfish and small lures along canyons and edges
Top bait: Rigged ballyhoo

Plan a day fishing for White marlin

How to recognise it

First dorsal fin tall and rounded at the front, dark blue with black spots (Wikipedia, FishBase)
Pectoral fins with rounded, wide tips (English and German Wikipedia)
Dark blue back with narrow pale bars, silvery white sides often blotched with brown (German Wikipedia, FishBase)

Easily confused with: Roundscale spearfish (Tetrapturus georgii), only separated genetically in 2001: in the spearfish the anus sits farther from the anal fin (more than half the anal fin length) and the scales are broad and round at the front (Wikipedia). The US minimum size is the same for both (NOAA Fisheries). Blue marlin: larger, first dorsal fin pointed and without spots (German Wikipedia, Blue marlin).

How to catch it

Methods: Trolling baitfish and small lures along canyons and edges, Trolling teasers, then switching to a bait (bait and switch, rule of thumb), Natural baits on circle hooks, which are quicker to remove (Wikipedia), Keep the fish in the water to unhook it, which lowers post-release mortality (Wikipedia)

Baits: Rigged ballyhoo, Small skirted trolling lure, Squid or squid imitation, Flying fish, Live mackerel (rule of thumb)

The species reaches higher latitudes only during the local warm season (FishBase), so off the US East Coast in summer. It avoids water below 22 °C (German Wikipedia). The White Marlin Open in Ocean City, Maryland, takes place every year (Wikipedia); ask your operator for the best weeks in each area (rule of thumb).

Habitat and food

Atlantic, roughly 45° N to 45° S in the southwest and 35° S in the southeast; records from the Mediterranean and off Brittany seem to be strays (FishBase). Oceanic, in deep blue water over 100 m, usually above the thermocline, 0 to 150 m, mostly 0 to 100 m, surface temperatures above 22 °C (FishBase). Northern limit roughly Cape Hatteras to the Bay of Biscay; likes fronts between water masses, upwelling zones, drop-offs and submarine canyons (German Wikipedia). Also in the Gulf of Mexico and the Caribbean (Wikipedia).

Fish and squid (FishBase), preferably flying fish, small tunas, mahi-mahi and squid; dives to about 200 m when hunting (Wikipedia). Stuns prey with blows of its bill (German Wikipedia).

Size and age

FishBase: max. 300 cm, commonly around 210 cm, maximum published weight 82.5 kg, mean length at maturity 164 cm. Wikipedia gives the largest fish as 2.8 m lower-jaw fork length and over 82 kg, maturity at 153.2 cm (males) and 189.9 cm (females), lifespan 15 years or more. German Wikipedia gives maturity from about 1.3 m. Females grow larger (FishBase).

Protection and rules

Conservation status: IUCN: Least Concern (assessed 1 May 2021; FishBase); Wikipedia describes a steep decline from bycatch. USA, Atlantic and Gulf: HMS Angling permit or HMS Charter/Headboat permit for the vessel (NOAA Fisheries, retrieved 21 Oct 2026). Minimum size 66 inches lower-jaw fork length, the same for roundscale spearfish; no per-angler bag limit, but no more than 250 blue marlin, white marlin and roundscale spearfish combined may be landed per year in the whole US; none may be kept if a hammerhead or oceanic whitetip shark is on board (NOAA Fisheries, page updated 4 Aug 2025). According to Wikipedia, US federal rules require billfish that are released to stay in the water boatside; check the official text in the HMS Compliance Guide. A state saltwater licence is also required (NOAA Fisheries).

Rules in the USA

In the USA, each state sets its own size limits, bag limits and seasons. Pescaday does not list these rules yet: check them with the fish and wildlife agency of the state you fish in. Fishing licence USA: agency by state

In Germany we found no minimum size or closed season for this species in any state fisheries regulation.

In the kitchen

The flesh is considered excellent and is sold fresh and frozen (FishBase). About 90 percent of the annual catch is commercial bycatch (Wikipedia); sport anglers almost always release white marlin, and the White Marlin Open encourages tag and release (Wikipedia).

Sources (7)

Last checked 2026-10-22. Found a mistake? Write to [email protected].

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