Comet | Calloplesiops altivelis | Lembeh Strait, North Sulawesi, Indonesia
This is a comet (Calloplesiops altivelis), an elegant, cryptic fish that possesses a false eye on its dorsal fin, probably to mislead predators. When alarmed, comets poke their heads into a hole or crevice and expose their tail ends in order to discourage potential predators by mimicking the head of the moray eel.