Location & Habitat: drifting on deep sea currents, sightings before Indonesia and in Antarctica
Appearance & Behaviour:
Up to 100 cm in length this mermaid seems to have little in common with human anatomy besides her face, which looks irritatingly similar to ours, just as her cranium does. At the same time she is missing a visible spine, prompting us to question whether she should still be classified as a mammal.
Regarding her skull's similarity to ours we would assume her brain size to be similary large in proportion to her body as ours is, yet how does the apparent lack of a further nervous system influence her development and intelligence?
From what we can tell her body consists of little more than a thin layer of muscles around barely visible organs situated at the core of her body and a mucuslike substance which seems to be sustaining her, since she does not seem to feed otherwise.
How did this mermaid attain this substance in the first place? What happens should she use it all up? How does she reproduce? Current hypotheses assume she might be spawning parts of her innards as eggs which then slowly gather particles floating in the sea. Cells which are part of the substance use calcium and other minerals to form her skull, use other particles and cells to grow a brain, organs and muscles until the creature has fully developed. Until that happens it remains an insentient blob of muscus drifting along and gathering material. Maybe this is not an actual mermaid at all, but a parasite salvaging the remains of other mermaids' remains to build itself a body.
Though, why then would it feed on itself?
This is a rather mysterious mermaid indeed.
Loosely related research: Videos of larvae of a moray eel . Very pretty. (Not my area of research so I can have very unscientific opionions on this.)
Dr Cecilia Lillefisk, Syrenilogist and renowned author of 'Pool Sharing - A self study of interspecies relationships between humans and mermaids'