CornetfishesFistulariidae

Cornetfishes are extremely elongated, cylindrical fishes within the family Fistulariidae. A long, tubular snout terminates in a small terminal mouth. The dorsal and anal fins are positioned far back on the body, close to a forked caudal fin that features a single, extremely long central filament. Adults commonly reach 1 m (3.3 ft) in length, with maximum sizes up to 1.6 m (5.2 ft). Colouration varies, typically presenting a mottled grey, brown, or greenish pattern; these colours can change rapidly for camouflage.

Cornetfishes inhabit coral reefs, seagrass beds, and sandy bottoms, occurring from shallow waters down to 150 m (492 ft). They are solitary ambush predators, feeding primarily on small fishes and crustaceans. Individuals are often observed hovering motionless, head-down, or drifting slowly, sometimes concealed behind larger herbivorous fishes for cover. They capture prey by darting from cover with a rapid lunge, employing suction feeding.