1boy, 1girl, abs, alternate_pectoral_size, bara, blue_theme, brown_hair, completely_nude, fins, fish, fish_boy, fish_tail, large_pectorals, looking_at_viewer, mermaid, merman, monster_boy, monster_girl, monsterification, muscular, muscular_male, navel, nipples, nude, pectorals, short_hair, sideburns, smile, solo_focus, stomach, tail, underwater