Swordfish

Identification and comparisons

The long, flattened upper bill is the signature feature. A stout body, large eyes, tall first dorsal fin and powerful crescent-shaped tail complete the outline. The bill is flatter than the rounded bill of a marlin. Adult swordfish also lack pelvic fins. A distant surface fin by itself is not sufficient identification, and the animal’s speed and strength make close approaches inappropriate.

Atlantic Florida occurrence

The National Park Service lists this species among fishes reported in Biscayne National Park. That supplies specific Atlantic South Florida occurrence evidence. The historical list does not establish current abundance, a particular reef location or guaranteed sightings on a trip. Biscayne reported-fish list. Swordfish belong in the offshore part of this guide, not among promised shallow-reef encounters.

Biology and size

Swordfish are oceanic travelers associated with the Gulf Stream and a broad range of depths. They eat fishes and squid, using the bill to strike prey. Specialized tissues help warm the eyes and brain during excursions into cold water. Females release eggs in repeated spawning events; NOAA describes spawning off the southeastern United States during April–August, not a verified calendar for any single Palm Beach site. NOAA swordfish biology.

For a whole fish, the relevant recreational measurement is lower-jaw fork length: a straight line from the lower-jaw tip to the tail fork. It excludes the projecting sword. A dramatic bill makes ordinary total length especially easy to confuse with the regulated measurement.

Three things worth noticing

• The sword is an extension of the upper jaw.
• The legal lower-jaw measurement does not start at the sword tip.
• An oceanic predator can make extensive vertical as well as horizontal journeys.

Observation and harvest caution

NOAA currently lists the recreational fishery as open, with a 47-inch lower-jaw fork-length minimum for whole fish. Federal HMS permit requirements apply to federal-water fishing; a trip conducted exclusively in state waters can be exempt from that federal permit requirement. Reporting and retention requirements depend on the applicable rules, permit and vessel type. Check NOAA’s live swordfish rules and FWC guidance before fishing. A regional species profile is not permission to retain a particular catch.

Observe without chasing, touching, feeding or moving the animal. Leave shelter and attached organisms in place, keep fins and equipment clear of the bottom, and let the fish choose its distance. For a useful record, retain the date, location, depth and original photographs. If the distinguishing features are hidden, an uncertain identification is better than a confident but unsupported name.

Current observation and collection guidance

Checked November 12, 2026: NOAA lists the Atlantic recreational swordfish fishery as open, with a 47-inch lower-jaw fork-length minimum for whole fish. HMS Angling permit limits are one per person, up to four per vessel per trip; charter and headboat allowances differ. FWC states the federal HMS permit is required in federal waters, not for state-water-only swordfish fishing. Landings must be reported to NOAA within 24 hours. Verify current permit, vessel, gear and species-onboard restrictions before fishing. Biscayne National Park fish checklist NOAA recreational Atlantic swordfish limits and fishery status FWC billfish and tuna regulations NOAA Atlantic highly migratory species reporting

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