Side by Side

King Mackerel Scomberomorus cavalla

Typical: 24–40 in, 8–20 lb

Key field mark: The sharp downward dip in the lateral line under the second dorsal, plus a pale (not black-fronted) first dorsal fin, marks a king mackerel.

• Steel-blue back, silver sides; adults lack spots
• Lateral line drops sharply downward below the second dorsal fin
• First dorsal fin uniformly pale (no black front patch); folds into a groove
• Slender elongate body, deeply forked tail
• Row of finlets behind dorsal and anal fins
• Juveniles may show faint yellow spots

Full King Mackerel guide — season, gear and rules →

Wahoo Acanthocybium solandri

Typical: 40–60 in, 20–50 lb

Quickest tell: Vivid electric-blue vertical bars and a long razor-toothed beak separate wahoo from the unbarred, spot-free king mackerel.

• Long, slender, torpedo body; iridescent blue-gray with vivid blue vertical bars
• Long beak-like snout with razor triangular teeth
• Tall first dorsal fin running most of the back
• Deeply forked tail, row of finlets
• Hinged jaw that folds; skin appears nearly scaleless

Full Wahoo guide — season, gear and rules →

When Each Is Running July — current month highlighted

Where King Mackerel and Wahoo Overlap

Both run in Gulf of Mexico, South Florida & the Keys, Southeast Atlantic — that is where telling them apart actually matters.

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