Plate 18 of 79SaltwaterOffshore

King Mackerel

Scomberomorus cavalla — also called kingfish, smoker (large)

The kingfish — a long, fast mackerel of the nearshore ocean and offshore wrecks, taken by slow-trolling live bait along bait schools and structure in late summer and fall.

Typically present

advancedBoat recommendedOffshore oceanNearshore ocean

Practice this species

Try a simulated catch in Seven Casts. Use this guide and its official sources to plan a real trip.

This profile has not yet been checked against an official regional data source — confirm identification, seasons, and regulations before you rely on it.

King Mackerel (Scomberomorus cavalla) — Fig. 18. Scomberomorus cavalla
Photo: Brandi Noble, NOAA/NMFS/SEFSC Pascagoula Laboratory, National Oceanic and Atmospheric Administration — Public domain

Habitat: Offshore waters
Methods: Inshore boat, Offshore
Typical size: 10–25 lb
Eating: fair

Identification

Look for

Lateral line drops sharply below the second dorsal fin — the field mark that separates a small king from a Spanish mackerel
First dorsal fin pale and uniform, with no black patch at the front
Long, streamlined silver body; juveniles may carry faint yellow spots that fade with size

Typical size here: 10–25 lb
Notable fish: 40 lb-plus 'smokers' nearshore in late summer

Tell them apart

Look first: Follow the lateral line: a sharp drop under the second dorsal fin means king.

King Mackerel

This specimen photograph shows a dark front on the first dorsal fin, which conflicts with the record's own field mark for the species; the lateral-line drop and the pale dorsal are deliberately not marked until the figure is re-verified (see docs/IMAGE-RIGHTS.md).

Spanish Mackerel

Look at	King Mackerel	Spanish Mackerel
Lateral line	Drops sharply below the second dorsal fin	Slopes gently along the side
First dorsal fin	Pale and uniform — no dark patch	Black patch on the front portion
Spots	Juveniles may show faint yellow spots that fade; adults plain silver	Gold to bronze spots on the sides at all sizes
Size	Commonly 10–30 lb, often much larger	Typically 1–3 lb

Numbers on the figures match the rows; a grey number has no mark on either figure. Small kings are the usual mistake — the dorsal-fin patch and the lateral line hold at every size.NOAA Fisheries — king mackerel

Local waters

Nearshore ocean structure and bait schools
Offshore wrecks and reefs

Primarily a boat fishery here — typically fished by inshore boat, offshore boat.

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When to fish

Typically present: summer, fall

Late summer through fall, nearshore and offshore.

Water temperature

The water, not the calendar, sets the season here — a warm October or a cold snap moves these bands.

Water temperature and the seasons

How to catch it

Slow-troll live bait (bunker, cigar minnows) on stinger rigs along nearshore structure and bait schools; kings strike from behind, which is why the trailing treble matters.
Fish an open drag with a light click — the first run is fast and long; set by tightening, not by swinging.
Single-strand wire between hook and leader; the teeth cut anything else.

Bait & lures

Trolled spoons or diving plugs
Live bait (menhaden, cigar minnows) on a stinger rig

Tackle to start with

Ranges, not rules — match the day, the water, and the fish in front of you.

Rod: 7 ft medium-heavy live-bait rod; 20–30 lb class conventional trolling outfits
Line: 20–30 lb mono or braid
Leader: Single-strand wire, 40–60 lb
Hooks: 4/0–6/0 live-bait hooks with a #4–#2 treble stinger

Rigs for king mackerel

All rigs

Terms usedPresentation

On the table

Rich, oily flesh that smokes and grills well when fresh. Federal fish advice lists king mackerel among the highest-mercury fish — treat it as an occasional fish, and check current advisories and VMRC limits.

Long, sharp teeth — pliers and a net; keep the mouth away from bare hands.
Federal FDA/EPA fish advice lists king mackerel among the highest-mercury fish — check that advice before eating it regularly.