* Green: Many eels have a greenish hue, especially when they are in the water. This coloration helps them camouflage in their environment.
* Brown: Brown is another common color for eels, and it can range from light brown to dark brown.
* Yellow: Some species of eels have a yellow or yellowish-brown coloration.
* Black: Some eels are black, and this coloration can be solid or with other markings.
* Spotted: Some eels have spots, which can be black, white, or brown.
* Striped: Other species of eels have stripes, which can be black, white, or brown.
It's important to note that the color of an eel can vary depending on the species, the environment, and the individual eel's age and diet.
Here are some examples of eel species and their colors:
* American Eel (Anguilla rostrata): Olive green to brown with a yellow belly.
* European Eel (Anguilla anguilla): Dark olive green to brown with a yellow belly.
* Moray Eel (Muraena): Can have a wide range of colors, including brown, black, yellow, green, and spotted.
* Conger Eel (Conger conger): Typically brown to black with a white belly.
So, while there isn't a single answer to "what color are eels," they are known for having a wide range of beautiful and interesting colors.