Usually when Our Mermaids Are Different, they still tend to be part fish, or more specifically the scaled kinds. It's less common to see a merfolk that's part shark or ray, or part cetacean, crustacean, cephalopod, mollusk, etc. But they do show up in fiction, and that's what this trope is about. Also these merfolk are still just as likely to have the Mermaid Problem, unless they are part aquatic mammal or part shark. See also Selkies and Wereseals. Compare Petting Zoo People, Cthulhumanoid, Snake People. Examples of Unscaled Merfolk include: