What are commonly referred to as melanoid axolotls are generally much darker than other axies and lack shiny pigments (called iridophores) found on other types. Their bellies are usually lighter and they lack shiny rings in their eyes. However, there are several variants within the mel morph. Light mels are grayer in tone. Axanthic mels lack yellow pigment. Dark mels can be almost solid black.

Their gills generally vary from purple to red to black.

For what it’s worth, the term “melanoid” can cross over into other varieties, as by definition it simply means an axolotl without shiny eye rings or iridophores. However for our purposes we go with the common term and apply it to our selection of dark mel axolotls for sale that fit the description above.