Side by Side

Cobia Rachycentron canadum

Typical: 30–45 in, 15–40 lb

Quickest tell: A brown lateral stripe on a flat-headed, remora-like body with low isolated dorsal spines identifies cobia (often mistaken at a glance for a shark, which has gill slits and rough denticle skin).

• Long, broad, flattened head; dark brown back
• Single horizontal dark stripe with paler band above and below
• Row of 7-9 short, stout, separate spines ahead of the dorsal fin (no connecting membrane)
• Broad shark/remora-like head with projecting lower jaw
• White belly; broad, slightly forked tail

Full Cobia guide — season, gear and rules →

Sharks Carcharhinus limbatus

Typical: 2.5–6 ft, 10–90 lb

Key field mark: Open gill slits and rough denticle skin confirm a shark; common SE species split by snout/teeth: blacktip (black fin tips), bonnethead (shovel head), Atlantic sharpnose (white-spotted with white fin edges).

• Cartilaginous body, 5-7 gill slits on each side (no gill cover)
• Rough sandpaper skin (dermal denticles), no true scales
• Heterocercal tail with longer upper lobe
• Mouth set under the snout (ventral)
• Multiple rows of replaceable teeth
• Rigid fins that do not fold into grooves

Full Sharks guide — season, gear and rules →

When Each Is Running July — current month highlighted

Where Cobia and Sharks Overlap

Both run in Gulf of Mexico, Mid-Atlantic, Southeast Atlantic — that is where telling them apart actually matters.

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