The Merperson: Medium-Dark Skin Tone emoji is a modifier sequence combining ? Merperson and ? Medium-Dark Skin Tone. These display as a single emoji on supported platforms.
Merperson: Medium-Dark Skin Tone was added to Emoji 5.0 in 2017.
U+1F9DC
U+1F3FE
?? Merperson
?? Emoji modifier fitzpatrick type-5