awesome one step closer to a positive IDMacrobrachium nipponense I think!!!
Yeah, get them out, mine would eat anything living (she has tried to eat my shrimp that were just a little bit smaller than her at the time) she has also attacked me on several occasions!!! You're from the uk too.. Where abouts did you get them, I got mine from pets at home.. Mine was with 'amano' shrimp.. I bought three, the big one, an amano shrimp and a glass shrimp.
Seems like pets at home have quite a few different shrimps, the first pic looks different from mine but the second looks a little bit alike