I propose having mermaid/mermen tails added to the game!!!
The following is an example of the tails general look and colors. In game the tail's fin would stick out from the back and not from the side (like in the example image.)
Here are 3 different colored head fins; I didn't include a head fin for the grey/silver tail simply because there is already a grey shark head and a shark fin.
【ｌｅｔ ｍｅ ｋｎｏｗ ｗｈａｔ ｙｏｕ ｔｈｉｎｋ ｉｎ ｔｈｅ ｃｏｍｍｅｎｔｓ】