Birdmouth wrasses are small, elongated fish that display strong sexual dimorphism (males and females look different).
Males are vivid blue-green with yellowed fins. Their snouts grow disproportionately long, often with bulbous protrusions.
Females are significantly smaller, with comparatively drab colouration. They are yellow-brown with white underparts. Their snouts are also elongated, but more slender than the male’s.
Birdmouth wrasses use their elongated snouts, which have small mouths on the end, to prey on small invertebrates in cracks and crevices.
They are abundant around Indian Ocean reefs, particularly on the African coast.