|Male from North Sulawesi|
|Female from Borneo|
The ribbon eel, Rhinomuraena quaesita, or Bernis eel, is a species of moray eel, the only member of the genus Rhinomuraena. What is now known as Rhinomuraena quaesita also includes the former Rhinomuraena amboinensis. R. quaesita was used for blue ribbon eels and R. amboinensis for black ribbon eels, but these are now recognized as the same species. The ribbon eel is native to the Indo-Pacific ocean.
The ribbon eel is an elegant creature with a long, thin body and high dorsal fins. The ribbon eel can easily be recognised by its expanded anterior nostrils. Juveniles and sub-adults are jet black with a yellow dorsal fin, while females are yellow with a black anal fin with white margins on the fins. The adult males are blue with a yellow dorsal fin.
Like many eels, the ribbon eel is sometimes thought to be angry or aggressive, because its mouth is often open, appearing ready to strike. In reality, the eel is simply breathing.
In the wild, the ribbon eel buries itself in sand or hides in rocks or reefs, dashing out to feed on shrimp and fish.
In the aquarium
Because most ribbon eels do not live longer than a month in captivity, some feel that this species should never be purchased. Ribbon eels have been observed in nearly every case to stop eating after being captured, although there are reports of them surviving and eating in captivity for 2 years or more.
With proper sized tanks, water flow, and depth of proper sand they can be kept for much longer in pairs.