Cherry shrimp, but can be labeled Red Sakura (Sakura in Japanese Kanji means Cherry Blossom or just Blossom), if the yellow saddle becomes visible I think they get called Split Back Red Sakura (has been said to be moulting problems but mine comes and goes so I think it's normal, probably apparent when the shrimp hold of from moulting when carrying eggs in the undercarriage), I've got a few of them, they can go a deep blood red, I have one that's been crossed with a Red Rilli and its a patchwork of Red and Royal Blue.