My own Liomera cinctimana ate Soft Corals (Capnella sp.). But i had them in a seperate tank, with other crabs. I feed her with the softcorals, but he ate every other food, too. I don´t know, if he eats SPS or LPS Coral polyps. I have not stone corals in this trank. But it would be possible.
It is a very pretty crab. Do you have a sump, thats enough for the crab.
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The image and the video show the same crab. Highly variable in coloration. When they molt, they can look completely different than before.
Pic with the white carpax before molt.
Pic wiht the redish carpax after molt.