๐ง๐ผโโ๏ธ is merman: medium-light skin tone, shown as a man with a fish tail and a bare torso.
This usually means ocean fantasy, a love for the sea, or a magical escape vibe.
For example, people use it for 'Living my best life by the sea ๐ง๐ผโโ๏ธ' or when talking about scuba diving and snorkeling trips.