Blackfin Barracuda

Overview

The Blackfin Barracuda is a large, predatory fish widely distributed across the tropical and subtropical waters of the Indo-Pacific. Known for its elongated, silvery body and distinctive dark markings, this species is frequently encountered by divers and snorkelers near coral reefs.

Distribution & habitat

This species is found throughout the Indo-Pacific, ranging from the Red Sea and East Africa to the central Indian Ocean and French Polynesia, with occasional reports in the tropical Eastern Pacific. They typically inhabit coastal waters and are commonly associated with current-swept lagoons and seaward coral reefs.

Appearance

The Blackfin Barracuda features a slender, cylindrical body with a silvery sheen that fades to white ventrally. It is characterized by 18 to 22 dark, prominent lateral bars that are oblique in the upper half of the body and become nearly vertical toward the belly. A key diagnostic feature is its largely blackish caudal fin, which often displays a scalloped margin with a central notch in adults. Unlike many other barracuda species, it lacks gill rakers, possessing instead rough platelets on the gill arches.

Biology & behavior

During the day, these barracudas are typically observed in large, semi-stationary schools that may occupy the same reef site for months or even years. They are active, visually oriented predators that likely disperse from their daytime schooling sites at night to hunt. While generally not aggressive toward humans, they are highly regarded by recreational anglers and are often targeted by trolling at dawn or dusk.