The red cornetfish (Fistularia petimba), also known as the rough flutemouth, is a cornetfish of the family Fistulariidae, found in subtropical and tropical oceans worldwide, at depths between 10 m (33 ft) and 200 metres (660 ft).

[3][2] Fistularia petimba is widespread in warmer parts of the Atlantic Ocean and Indo-Pacific, including the waters of Australia and Hawaii.

In tropical areas, it tends to occur deeper or in places with cold upwellings.

[2] It is an oviparous species which lays large pelagic eggs which hatch into larvae of 6–7 millimetres (0.24–0.28 in),[5] the juveniles move into estuarine habitats.

[1] This species is a crepuscular,[1] stealthy predator which stalks its prey by moving slowly towards shoals of small fish, using its slender form to hide, and when it is close enough to its prey it darts forward and sucks it into its mouth.