Bowmouth Guitarfish

Overview

The Bowmouth Guitarfish is a highly distinctive, large-bodied ray that exhibits a unique hybrid appearance, combining a flattened, ray-like head with a powerful, shark-like tail. This species is widely distributed across the tropical coastal waters of the Indo-West Pacific, where it is frequently associated with sandy or muddy seabeds and offshore coral reefs.

Distribution & habitat

This species occurs throughout the Indo-West Pacific, ranging from South Africa and the Red Sea across to India, Southeast Asia, Japan, and northern Australia. It is typically found in coastal areas and near offshore reefs, often resting on sand or mud bottoms, though it is occasionally observed swimming in the water column.

Appearance

Recognizable by its broad, rounded snout and large, high pectoral fins, the Bowmouth Guitarfish features heavy, thorny ridges over its eyes, nape, and shoulders that serve a defensive function. Its dorsal surface is typically bluish-grey to brown, covered in numerous white spots, while the underside is white. A key identifying feature is the W-shaped, undulating mouth equipped with rows of crushing, pavement-like teeth. Juveniles often display prominent black, white-edged markings above the pectoral fins, which may fade as the individual matures.

Biology & behavior

This species is a strong-swimming predator that is generally elusive and tends to move away when approached by divers. It is aplacental viviparous, meaning embryos develop internally within the mother, initially relying on yolk before receiving additional nourishment from uterine fluids. Litters typically consist of 2 to 11 pups.

Feeding

Using its specialized, ridged teeth, the Bowmouth Guitarfish feeds primarily on demersal bony fishes, crustaceans such as crabs and prawns, bivalves, and cephalopods.