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Sixfinger Threadfin
Legendary

Sixfinger Threadfin

Polydactylus quadrifilis

A silvery fish with distinctive thread-like fin rays extending from the pectoral fins, though typically has 4-5 threads rather than six. Popular food and sport fish along West African coasts and occasionally found in other tropical waters.

The record

Sixfinger Threadfin at a glance

Scientific name
Polydactylus quadrifilis
Typical size
12-24 inches, 1-4 lbs
Water
Saltwater
Habitat
Inshore
Rarity in the Fishdex™
Legendary
Where it lives

Habitat

Inhabits coastal waters, estuaries, and nearshore areas in tropical and subtropical regions. Anglers target them using light tackle with small baits near structure and in shallow coastal waters. They feed on small fish, crustaceans, and marine worms.

Catch one and it is yours

Log a sixfinger threadfin through the Cobia Camera and this entry fills in with your photo, your personal best, and the exact conditions on the day. The app also carries the slot and season rules for wherever you are standing.

How the Fishdex™ works
Questions

Sixfinger Threadfin questions people ask

Sixfinger Threadfin is Polydactylus quadrifilis.

A typical sixfinger threadfin runs 12-24 inches, 1-4 lbs. Cobia records the length and weight of every sixfinger threadfin you log and keeps your personal best on its Fishdex entry.

Inhabits coastal waters, estuaries, and nearshore areas in tropical and subtropical regions. Anglers target them using light tackle with small baits near structure and in shallow coastal waters. They feed on small fish, crustaceans, and marine worms. It is a salt water species, filed under inshore in the Fishdex.

Yes. Log one through the Cobia Camera and this entry fills in with your own photo, your personal best, and the conditions on the day you caught it. The app also carries the slot limits and season dates for wherever you are standing. It is free.

Free on iPhone

Tomorrow morning starts tonight

Set your home water, pick a drive radius, and wake up to a plan.

Download Cobia on the App Store Android coming soon

iPhone, iOS 17 or later. Setup takes about a minute.