![3boys bad_id bad_link bad_twitter_id birthday black_hair blue_eyes brown_hair free! future_fish gloves happy_birthday male_focus merchandise merman monster_boy multiple_boys nanase_haruka_(free!) official_style omanjuu_mascot open_mouth smile tachibana_makoto time_paradox younger rating:s score:1 post #1788288](/cdn_image/preview/43/53/4353bfbb63be4eb1f8ffc225ff786fe7.jpg)
A mythical sea creature which has the top half of a human male and the hind half (fins) of a fish. Less commonly known and often depicted less attractive than their female counterparts, though they've been looking more human and just as pretty as their female counterparts as time goes on.
Not to be confused with fishmen, which have a humanoid hind half but more fishlike characteristics throughout their bodies.
This tag implicates monster_boy (learn more).