Muku are a type of sea-serpent, slick and eel-like in appearance. Muku are usually white or light blue, and have long, flexible whiskers. Muku tend to be friendly and inquisitive; they feed on plankton and krill. Some muku who live near shipping lanes may follow ships out of curiosity. They tend to be interested in bright and shiny objects.
Muku are occasionally confused with true Sea Serpents, which are in fact a distinct species.