
Myrichthys colubrinus
Family: Ophichthidae ยท Eels
Also known as: Harlequin Snake Eel, Banded Sea Snake Mimic, Ringed Snake Eel
The Banded Snake Eel is a fascinating species that has evolved to closely mimic the appearance of highly venomous banded sea snakes, sporting bold alternating bands of black and white or cream across its elongated, cylindrical body. This remarkable example of Batesian mimicry provides the harmless snake eel with protection from predators that have learned to avoid the dangerous sea snakes it resembles. The deception is remarkably effective, and even experienced divers often mistake this eel for a genuine sea snake at first glance.
Unlike true moray eels, the Banded Snake Eel belongs to the family Ophichthidae and has several distinctive characteristics. It possesses a pointed, hardened tail tip adapted for burrowing backward into sand and rubble substrates, where it spends much of its time with only its head protruding. In the wild, it is often found in sandy areas adjacent to reefs, where it hunts small fish and crustaceans, emerging from the sand to actively forage across the substrate in a snake-like manner.
In the aquarium, the Banded Snake Eel requires a deep sand bed of at least four to six inches to accommodate its burrowing behavior. It is a peaceful species that is unlikely to bother most tankmates, though it may consume very small fish and ornamental shrimp. A secure, tight-fitting lid is absolutely essential, as snake eels are accomplished escape artists. This species is considered reef-safe with caution because while it will not damage corals, it may displace sand around coral bases during burrowing activities.
Banded Snake Eels are carnivores that feed on small fish and crustaceans in the wild. In captivity, offer frozen silversides, chopped shrimp, squid, and other meaty marine foods. Use feeding tongs to present food near the eel's head. Feed every two to three days. Some specimens may initially refuse non-living food and require live ghost shrimp or feeder fish to stimulate feeding, transitioning gradually to frozen foods.
The Banded Snake Eel is peaceful toward most tankmates but will consume very small fish and ornamental shrimp small enough to fit in its mouth. It is compatible with medium to large community fish including tangs, angelfish, clownfish, and wrasses. Avoid housing with very small species. Its burrowing behavior may disturb sand-dwelling invertebrates and unsecured coral frags. Can coexist with other eels in sufficiently large aquariums.
Check CompatibilityBanded Snake Eels have not been bred in home aquariums. In the wild, they produce pelagic eggs that hatch into transparent leptocephalus larvae. These larvae undergo an extended planktonic phase in the open ocean before settling to the substrate and metamorphosing into juvenile eels. The complexity of this larval development cycle has prevented captive propagation.