Barracuda are large, fast-swimming fish with long, razor-sharp, canine-like teeth in both jaws. They can grow up to 2.5 meters (8.2 feet) in length and weigh up to 50 kg (110 pounds). There are 22 species of barracuda that inhabit the tropical and subtropical oceans worldwide. Only one species, the great barracuda (Sphyraena barracuda), is dangerous to humans.

Barracuda bites are rare and often occur in waters with bad visibility when shiny jewelry, barrettes, brightly colored objects, and camera equipment may be mistaken for prey. Barracuda bites have also occurred after the fish has been speared or caught on a fishing line.

Barracuda bites can cause deep, slashing cuts. Damage to nerves, tendons, and large blood vessels is not uncommon. Significant tissue loss may occur. Barracuda teeth can break off inside wounds.

Bacterial contamination of wounds with marine pathogens such as Vibrio and Aeromonas is common.