How to recognise it
The Roundscale Spearfish, or Tetrapturus georgii, is a striking fish. It has a streamlined body with a long, pointed bill. The dorsal fin is large and triangular, often held high. The coloration is dark blue on the top and silver on the sides, with a distinct round scale pattern. The pectoral fins are long and slender, while the anal fin is smaller and more pointed. This species is often confused with the Mediterranean Spearfish (Tetrapturus belone), but the Roundscale can be identified by its round scales, which are more pronounced than those of the Mediterranean Spearfish.
Where it lives
The Roundscale Spearfish is primarily found in the warm waters of the Atlantic Ocean. In the United States, its range extends from Florida to the Gulf of Mexico and up to the Mid-Atlantic region. It prefers offshore waters, typically found at depths of 100 to 1,000 feet. This species often holds to floating debris, weed lines, and current edges. During warmer months, it may move closer to shore, while in cooler months, it tends to migrate to deeper waters.
When it bites
The best months to target Roundscale Spearfish are from May to October. They are most active when water temperatures range from 75 to 85 degrees F. Early morning and late afternoon are prime times for bites. Weather changes, such as a passing front or increased wind, can trigger feeding activity. A full moon may also enhance their feeding behavior, making them more likely to bite during the night.
How to catch it
To catch Roundscale Spearfish, use a combination of trolling and live baiting techniques. Popular rigs include the daisy chain and the ballyhoo rig. Use baits such as live ballyhoo or small tuna, typically 6 to 12 inches long. Lures in bright colors like pink, blue, and green are effective. For line, use 30 to 50-pound test monofilament or braided line. Hooks should be 6/0 to 8/0 in size. Cast near floating debris or current edges and troll at speeds between 6 to 10 knots. Work the lures with a steady retrieve, occasionally varying the speed to entice a strike.
Size, age and the table
Anglers typically encounter Roundscale Spearfish ranging from 40 to 60 inches in length and weighing between 40 to 80 pounds. A trophy fish is generally considered to be over 70 inches. The growth rate is relatively fast, with fish reaching maturity in about 2 to 3 years. The lifespan of this species can exceed 5 years. While the Roundscale Spearfish is not commonly eaten, it is considered to have good eating quality when properly handled. For catch and release, use wet hands and minimize air exposure to ensure a successful release.
