Leopard Eel (Mastacembelus cf. dayi)


A freshwater eel originating from the  Salween river along the Thailand/Myanmar border, the Leopard Eel is an as-yet undescribed species closely related to the more commonly seen Tiretrack Eel. An ambush predator in its natural habitat. In the aquarium, they are hardy but can be shy at first – be sure to provide plenty of cover. Although recently imported fish can be finicky eaters, they will usually learn to accept a variety of frozen foods. Like most freshwater eels, these fish should be kept in tightly covered aquariums as they will utilize even small openings to escape.


Leopard Eel (Mastacembelus cf. dayi)

Origin: Wild Salween River, Thai/Myanmar Border
Diet: Predator, feeds on insects, fish, and crustaceans in the wild. Will accept frozen foods but can be finicky at first.
Adult Size: 18″
Recommended Tank Size: 90 gallon
Compatibility: Generally not aggressive towards tankmates too big to be considered a meal. Should not be kept with overly aggressive fish which may nip at their fins or that may outcompete them for food.

Preferred Water Parameters
pH:                          7.0  – 8.2
Temp:                     76-82F
Ammonia:              0ppm
Nitrite:                    0ppm
Nitrate:                  <30ppm