target.species
King Mackerel
Scomberomorus cavalla
Sharp, fast, and equipped to bite a bait, or your leader, cleanly in half at speed.
Tolerances
Every field the compatibility engine reads for this species, with what the number actually controls. Change any component outside these windows in the studio and it raises a diagnostic against the value on this page.
| Field | Value | What it controls |
|---|---|---|
| weightLb | 8 – 40 lb | Typical caught weight, not the record. Sets how much the hook, knot, and drag actually have to hold on a normal day. |
| lineLb | 20 – 50 lb | Sane mainline test window. Under the low number you get broken off; over the high number you are paying in diameter, casting distance, and bites. |
| hookSize | 3/0 – 7/0 | Printed hook-size window on the unified scale. Matched to mouth and bait size; an oversized hook is the most common reason a fish never gets pinned. |
| leaderLb | 40 – 90 lb | Leader test window. Usually at or above mainline test, because the leader is the part that meets teeth, rock, and gill plates. |
| lineShy | 0.30 | How much a visible line costs you in bites, 0 to 1. Above roughly 0.6, a low-visibility fluorocarbon leader stops being optional in clear water. |
| abrasion | 1.00 | Teeth and habitat wear, 0 to 1. Above roughly 0.85 you are into wire-leader territory; in the middle you go heavier fluoro and check your last three feet after every fish. |
| minDragLb | 15 lb | The drag floor. A reel that cannot apply this much without stalling will get spooled or will pop the knot on the surge; the builder flags any reel under it. |
| depthBias | 0.40 | 0 is surface, 1 is hard bottom. Drives how much weight you need and whether a float, a bottom rig, or a topwater is the honest presentation. |
| structure | reef, open | Where the fish holds. Structure is what actually cuts you off, so it drives leader material as much as the fish itself does. |
| water | salt | Saltwater species: every metal component in the build must be corrosion-rated or it is consumable. |
Hook size for King Mackerel
3/0 to 7/0, with wire rated to at least 48 lb and a salt rating. Those are the two numbers the studio checks a hook against for this fish.
- hook-small · hook-large
- Below 3/0 the gap is too narrow to clear the jaw and the fish comes off. Above 7/0 it will not fit the mouth and drags a small bait down. Either raises a warning with a fix to the nearest edge.
- hook-wire-light
- A hook rated under 48 lb (1.2× a 40 lb top weight) gets flagged: once the fish turns, leverage at the point exceeds its weight.
catalogClears both checks: Eagle Claw Lazer Sharp Circle Sea 3/0 to 7/0, Mustad O'Shaughnessy Siwash 3/0 to 7/0, Mustad Demon Perfect Circle 3/0 to 7/0. In range but flagged: Jungle Flippin' Hook (not salt-rated); Superline EWG Worm Hook (not salt-rated).
King Mackerel against all the other species on the hook size chart →How hook sizes work →
Line for King Mackerel
20–50 lb mainline, 40–90 lb leader. Pound test is breaking strain, not thickness. 50 lb Daiwa braid measures 0.33 mm; 20 lb Berkley mono measures 0.45 mm.
- line-light-species · line-heavy-species
- Under 20 lb every snag and headshake becomes a coin flip. Over 75 lb (1.5× the top) you are paying in casting distance and visibility for strength this fish never tests.
- needs-wire
- Wire, every cast. King Mackerel rates 1.00 for abrasion and the studio errors on anything but wire from 0.95. Working leader window 40–90 lb.
- drag-floor · reel-capacity
- At least 15 lb of drag and 300 yards of line at your line's real diameter, for a fish to 40 lb.
our rigs20 lb copolymer (Stren) to 40 lb wire on Jetty & Pier, Nearshore Reef, Offshore Bluewater.
King Mackerel against all the other species on the line chart →Braid to mono diameter chart →
Rigs for King Mackerel
The named rigs anglers tie for King Mackerel, each built by our solver under that rig's rules and graded by the engine. Sizes are for the water where the rig scored best. Every rig is compared on the fishing rigs page.
Field notes
The parts that do not fit in a table. These are the judgement calls that decide whether the numbers above turn into fish.
Wire leader is standard. Fluoro at any sane test gets cut off, and the strike happens at 30+ mph.
A stinger rig with a trailing treble catches the short-strikers, which is most of them.
Recommended components
Nothing below is hand-picked. Each stage is scored by matching the item's own published spec against this species' tolerances: hook size overlap, line tests inside the window, drag headroom, rod line rating. Anything that fails a hard check is dropped rather than softened.
Mustad O'Shaughnessy Siwash
Long-shank single with an open eye you crimp onto a split ring or spoon. A single-hook option for spoon and plug rigging; check the rules and barb requirements for your water.
tradeoff Fewer points means fewer accidental hookups and more clean releases, and a genuinely lower landing rate on short-striking fish.
Verified destination: 34091-DT open ring · 5/0 · 100 pack (2026-10-20). Other sizes or packs are not verified by this link.
fitSizes #2–7/0 cover 3/0 to 7/0 of the window. Rated 65 lb before the wire opens, 1.30× standard gauge.
Mustad Demon Perfect Circle
A true circle: the point turns fully perpendicular to the shank, so it slides to the jaw hinge and sets itself when the fish turns.
tradeoff You must not swing. Reel down steadily and let it load. Every fish you miss on a circle hook, you missed by setting the hook.
Verified destination: Demon 39944 inline · 1/0 · 8 pack (2026-10-20). Other sizes or packs are not verified by this link.
fitSizes #1–10/0 cover 3/0 to 7/0 of the window. Rated 90 lb before the wire opens, 1.20× standard gauge.
Berkley Trilene Big Game
Heavy, tough, high-stretch mono sold in bulk spools. The default for surf rods, catfish, and anywhere you need shock absorption over sensitivity.
tradeoff Thick and stretchy. At 40 lb you are running nearly 0.6 mm through your guides, which costs real casting distance.
Verified destination: 20 lb / 650 yd / Clear (2026-10-20). Other sizes or packs are not verified by this link.
fitSpooled in 20, 25, 30, 40, 50 lb inside the 20–50 lb window. mono, 0.55 mm at 30 lb, visibility 0.45.
Sufix 832 Advanced Superline
Eight carriers including a GORE fibre, which makes it noticeably quieter through the guides and more abrasion-resistant than standard braid.
tradeoff A few dollars more per spool and the colour fades faster. The abrasion gain is real but it is still braid; it is not a leader.
Verified destination: 30 lb / 300 yd / Low-Vis Green (2026-10-20). Other sizes or packs are not verified by this link.
fitSpooled in 20, 30, 40, 50 lb inside the 20–50 lb window. braid, 0.33 mm at 40 lb, visibility 0.70.
American Fishing Wire Surflon Micro Supreme Wire
Nylon-coated 7-strand stainless. Supple enough to knot with a uni, tough enough that pike and mackerel teeth do not touch it.
tradeoff Wire is visible and stiff. It costs you bites from anything line-shy; use it only when the alternative is losing the fish and the lure.
Verified destination: Surflon Micro Supreme 90 lb, 5 m (2026-10-21).
fitwire in 40, 60, 90 lb across the 40–90 lb leader window. Abrasion 1.00, visibility 0.70.
Knot 2 Kinky Titanium Toothproof Leader
Single-strand titanium that will not take a set. Kink it, straighten it, and it comes back, which is why musky anglers run one leader all season.
tradeoff The most expensive leader material here by a wide margin. Justifiable only where a lost fish means a lost $30 bait too.
No exact product destination has been verified for this item.
fitwire in 45, 60, 80 lb across the 40–90 lb leader window. Abrasion 1.00, visibility 0.55.
Penn Fathom II Conventional
Lever drag, machined aluminium, and the line capacity offshore work actually requires. Set strike position on the dock and never touch it again.
tradeoff It is a boat reel. Heavy, no casting finesse, and completely out of place on anything but a real conventional rod.
Verified destination: Fathom II 30 LD 2-speed (2026-10-21). Other sizes or packs are not verified by this link.
fit30 lb max drag against a 15 lb floor, holds 400 yd of 30 lb mono. conventional, size 300, salt-rated.
Daiwa BG MQ Spinning Reel
A one-piece machined body with no flex under load at all. This is the reel for stopping something big before it reaches structure.
tradeoff Big, heavy, and overkill for anything under about 15 lb. Putting one on a bass rod is a wasted purchase.
Verified destination: BG MQ / BGMQ6000D-H (2026-10-20). Other sizes or packs are not verified by this link.
fit33 lb max drag against a 15 lb floor, holds 240 yd of 20 lb mono. spinning, size 6000, salt-rated.
Penn Prevail III Surf Rod
Ten feet of graphite composite built to throw four ounces of lead and bait over the breakers and then stand in a sand spike all night.
tradeoff You cannot fish this from a kayak, a small boat, or a tree-lined creek. It is a beach rod and nothing else.
Verified destination: Prevail III 10' Medium-heavy 2 pc (2026-10-21). Other sizes or packs are not verified by this link.
fitRated 15–40 lb, overlapping this fish at 20–40 lb. 10 ft, MH power, moderate action, 1–4 oz.
Ugly Stik GX2 Spinning Rod
Effectively indestructible. A graphite-fiberglass blend that shrugs off car doors, tailgates, and everything a beginner will do to it.
tradeoff Heavy and not remotely sensitive. You will feel a bite when a fish is already leaving with the bait.
Verified destination: GX2 6'6" Medium 2 pc (2026-10-21). Other sizes or packs are not verified by this link.
fitRated 8–20 lb, overlapping this fish at 20–20 lb. 6.6 ft, M power, moderate action, 0.25–0.625 oz.
King Mackerel rigs by water
A complete rig for each place King Mackerel is actually targeted, built by our solver from the catalog and checked by the same engine as the studio. Each page shows every check with the numbers.
Where you will find them
Venues that match this species' water type. Each one loads the studio with the pairing already set, so depth, current, and corrosion rules are applied before you pick a single part.
Open Surf Beach
Breaking waves and sweeping longshore current. Pyramid weights, long rods, and everything corroding as you stand there.
Inshore Flat
Skinny, clear, and spooky. Long leaders, quiet entries, and the lightest weight that still gets down.
Jetty & Pier
Barnacle-covered rock in moving water. The single most abrasive environment in this list; assume the structure is trying to cut you off.
Nearshore Reef
Structure under real depth. Getting down fast matters, and everything you hook immediately runs for a hole.
Offshore Bluewater
Miles out, deep, and unforgiving. The vessel is now the most safety-critical item in the entire build.
Venue profiles, with what each water does to a rig: Open Surf Beach, Inshore Flat, Jetty & Pier, Nearshore Reef, Offshore Bluewater.
Load King Mackerel as the target and the builder re-runs every check on this page live: hook window, line test, leader material, drag floor, as you swap parts.
Open the Rig Studio