Jacks
Jacks (Carangidae) Overview
Several fish species belong in the family of jacks, including trevallies, leatherbacks, rainbow runners, pompanos, scads and others. They usually stick to open waters near the edge of the reef. Occasionally they have been observed in shallow waters as well.
Jacks are strong fighting fish. Most feed on fish, which they usually chase with great speed, often making swift moves and changing directions to confuse their prey.
Jacks usually have silvery sides and undersides with greenish or bluish backs. This makes them difficult to spot.
Their Hawaiian name is ulua, and juveniles are papio. Uluas were admired in the old Hawaii for their vigor and strength.
Frequently Asked Questions
What types of fish are included in the jack family?
The jack family (Carangidae) includes trevallies, leatherbacks, rainbow runners, pompanos, and scads. These fast-swimming fish are common in Hawaiian waters near reefs and open ocean drop-offs.
Are jacks considered game fish?
Yes, jacks - especially giant trevallies (ulua) - are highly prized by anglers for their strength, speed, and challenge. They are known as fierce fighters once hooked.
What do jacks look like?
Jacks typically have silvery sides and bellies, with darker greenish or bluish backs. This coloring helps them blend into the ocean, making them harder for prey (and predators) to spot.
Where are jacks usually found in Hawaii?
Jacks often patrol the edge of coral reefs or open-water drop-offs. While they usually stay in deeper areas, they are sometimes seen in shallower waters, especially when hunting.
What is the Hawaiian name for jacks?
The Hawaiian name for adult jacks is ulua, and juveniles are called papio. In traditional Hawaiian culture, ulua were admired for their power and were considered symbols of strength.