Out of curiosity...

Where did your shrimp come from? The coast or LFS?

There's a few different species of peppermints, they're hard to tell apart. Ones at the LFS will vary with distributor and time of year.

The species found at our coast is supposed to be "more reef safe" than some other varieties.

This is just what I've read, and it's all supposition from hobbyists, no scientific proof.