Slingjaw Wrasse

Overview

The Slingjaw Wrasse is a distinctive reef-dwelling fish known for its extraordinary feeding mechanism. It possesses highly protrusible jaws that can extend into a tube reaching up to half the fish's body length, allowing it to capture prey hidden within complex coral structures.

Distribution & habitat

This species is widely distributed across the tropical Indo-Pacific, ranging from the Red Sea and South Africa to the Hawaiian and Tuamotu islands, and extending north to southern Japan and south to New Caledonia. It typically inhabits coral-rich lagoons and seaward reefs, often favoring deep slopes or drop-offs.

Appearance

The species exhibits significant variation in color based on age and sex. Females and sub-adults are generally plain brown or uniformly yellow. Terminal males are more ornate, featuring a white face, a dark horizontal streak through the eye, and a body marked with orange and yellow. Juveniles are brown with thin white vertical lines and resemble members of the genus Wetmorella.

Feeding

Using its unique jaw apparatus, the Slingjaw Wrasse creates powerful suction to snatch small crustaceans and fishes from crevices or coral branches. When not in use, this specialized mouth structure is folded neatly under the head. In the wild, they have also been observed flipping stones to expose prey and occasionally visiting cleaning stations.

Biology & behavior

These fish are generally solitary and benthopelagic. They are protogynous hermaphrodites, meaning they start life as females and can transition into males as they grow larger. They are sometimes observed patrolling specific mating territories.