It depends on how the artist or author wants to have the mermaid. Most are pictured with tails as part of the myth, but if a artist wanted to make a new mermaid he/she could. It is all make believe anyway so they can look any way you want.
Mermaids' tails aren't any specific colors, and they can be whichever color you prefer.
mermaids get their tail any time thy chande to mermaids
nymphs
fish tails
yes
Mermaids are not real so you can't get tails like a mermaid
Mermaids aren't real so the person who made them up gave them tails.
Mermaids have the upper bodies of women and fish tails.
they come from the ocean.There bones are coral and there tails are from large fish tails or God just made them.
It is really hard to say since mermaids are mythological creatures and no one has ever seen one.
Perhaps in some work of fiction there are mermaids like that and there is nothing preventing someone from writing a story along those lines. In real life no, as mermaids are not real.
Mermaids have fish tails , you do not want to look like that!