Merpersons

[bi3mw]

However, calling the representation 'androgynous' is a bit odd, if the definition of androgynous is to have characteristics of both the male and female genders - when, in the given illustration, basically, there are no representations indicative for either sex.

Yes, instead of "androgynous", "indeterminate" would probably be a better description. You know now that it's a male figure, if you didn't you wouldn't be so sure in my opinion (narrow shoulders, soft facial features).

I would say that @Koen has given a good description / reasoning about the appearance here.