Foureye Butterflyfish

The Foureye Butterflyfish has a bright white body with thin, blue diagonal lines running down its sides. It has a distinctive, large, white-ringed black spot on each side near the tail's base, which looks like an eye. A vertical black bar passes through the real eye, and some yellow coloration is visible on its fins. Juveniles have an additional smaller black spot on the back of the dorsal fin and two dark bars on their body.

This Butterflyfish often forms a pair with a single partner, with whom it will stay for life. If separated, the partners will try to find each other again. It feeds on small invertebrates and sometimes eggs, using its small, protruding snout. At dusk, pairs release eggs and sperm into the water, and the tiny floating eggs hatch within a day into larvae. The 'four-eye' look is a defense mechanism. The large, dark spot ringed in white near the base of its tail acts as a false eye. This spot, combined with the vertical black bar that runs through its real eye, helps confuse predators.