even if one says

a mermaid

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

a sea, an ocean / a lake / (figuratively) an object covering over a large area, as in 血の海 (chi no umi, “pool of blood”) or 火の海 (hi no umi, “sea of fire”)

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

to say, to tell somebody / to call, to name, to give a name / to cry, to call, to make a noise (such as an animal)

disgraceful, shameful, indecent / shabby, unsightly

past tense and perfective aspect of 言う (iu, yū) [godan]