6 in (15 cm)
Around 8 years.
6–65 ft (2–20 m)
Foureye butterflyfish are active during the day, when they feed on small invertebrates, such as worms and gorgonians. Their pointed mouth allows them to pull prey from small crevices. Foureye butterflyfish are often found in pairs – males and females bond early in life and form long-lasting monogamous pairs.
Barracuda, grouper, snapper and moray eels.
Did you know?
The foureye butterflyfish has a large spot on its tail, which resembles a large eye. This design is meant to confuse predators about the direction that a fish is facing. Predators aim for the eye and adjust their attack towards the direction their prey is likely to flee, so appearing to face backwards can be a great advantage.