>>34974162As a Primarina fan, no, Primarina isn't exactly a pure sea lion. It has elements of sea lions and mermaids and mermaid anatomy.
With that said, Popplio wasn't ever close to resembling real sea lions either in that sense, and Primarina is still really similar to it but with hair, so it would be illogical to expect something like real life seal evolution out of something that never looked like one.