As You Know, mermaids, like all fictional creatures, can vary in their portrayal from work to work. However, despite all the differences in mermaid portrayals, they seem to have one thing in common. For some reason, mermaids tend to be called sirens, and are given the ability to sing phenomenally well, to the point of leading unsuspecting people to their doom. Compare Our Mermaids Are Different. Examples of Sirens Are Mermaids include: