Tony Wu / Comet (Calloplesiops altivelis) an elegant, cryptic fish that possesses a false eye on its dorsal fin, probably to mislead predators, Lembeh Strait, North Sulawesi, Indonesia

Franco Banfi / Comet longfin (Calloplesiops altivelis), Maldives, Indian Ocean

Juergen Freund / Detail of skin of Comet longfin fish (Calloplesiops altivelis) Komodo NP, Indonesia, Indo-pacific.

Juergen Freund / Comet Longfin (Calloplesiops altivelis) Indo-Pacific

Constantinos Petrinos / Comet longfish {Calloplesiops altivelis} Moray eel mimic, Sulawesi, Indonesia

Joel Sartore / Photo Ark / Marine betta (Calloplesiops altivelis) portrait, private collection. Captive, occurs in Indo-Pacific.

Joel Sartore / Photo Ark / Marine betta (Calloplesiops altivelis) head portrait, private collection. Captive, occurs in Indo-Pacific.

Joel Sartore / Photo Ark / Marine betta (Calloplesiops altivelis) portrait, private collection. Captive, occurs in Indo-Pacific.

David Fleetham / Comet / Marine betta (Calloplesiops altivelis) hiding on a reef, Philippines, Philippine Sea.

Joel Sartore / Photo Ark / Comet longfin (Calloplesiops altivelis) swimming through the frame, The Fish Store, Nebraska, Lincoln, USA.