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Behaviour and diet

Barracudas are ferocious, opportunistic predators, relying on surprise and short bursts of speed, up to 27 mph (43 km/h), to overtake their prey.

Adults of most species are more or less solitary, while young and half-grown fish frequently congregate.

Barracudas prey primarily on fish (which may include some as large as themselves). Common prey fish include jacks, grunts, groupers, snappers, small tunas, mullets, killifishes, herrings, and anchovies; often by simply biting them in half. They kill and consume larger prey by tearing chunks out of their prey. They also seem to consume smaller species of sustenance that are in front of them. Barracuda species are often seen competing against mackerel, needle fish and sometimes even dolphins for prey.

Barracudas are usually found swimming in saltwater searching for schools of plankton-feeding fish. Their silver and elongated bodies make them difficult for prey to detect, especially when viewed head-on. Barracudas depend heavily on their eyesight when they are out hunting. When hunting, they tend to notice everything that has an unusual color, reflection, or movement. Once a barracuda targets an intended prey item, its long tail and matching anal and dorsal fins enable it to move with swift bursts of speed to attack its prey before it can escape. Barracudas generally attack schools of fish, speeding at them head first and biting at them with their jaws. When barracudas age, they tend to swim alone. However, there are times when they tend to stay with the pack. Barracudas will sometimes swim in groups. In this case, they can relocate schools of fish into compact areas or lead them into shallow water to more easily feed on them.