I just googled peppermint shrimp and it seems there is only one species.
Here's the article.
Peppermint Shrimp are opaque to creamy-clear in color, with red or maroon colored stripes running along the length of the body. Often misidentified or misrepresented and sold as the Camelback Shrimp (Rhynchocienetes uritai), these two species are NOT the same and should not be confused. This is the only TRUE Peppermint Shrimp