I know for sure the dark ones are Majano. Every picture I found is dead on. And one just keeps moving every night, Still on the same rock though. I have three in total of the darker.
And as for the two pink and green, they do have "mouths" and one moved maybe 1/4" last night.
Yesterday I moved the rock just enough so it was not touching any other rock. Will they move over sand?
I just hate the idea of killing them, would a lighted sump be a good place for them?
And this has helped oh so very much, thank you.
Slight update
Well so far every article I see, just says how to kill them. Or they are only a pest if your tank is less than perfect.