that is the peacock mantis, a smasher.
will eat snails, crabs, small mussels, clams ect....will eat fish if its hungry or kill them if irritated by them.
tank needs to have low light
supplement their diet with some vitamins, and for treat give them snails.( they need to get their vitamins)
very intelligent critter,and can see better than a human.
If irritated when molting it can stress and die. needs a nice deep substrate to borrow in and lots and lots of LR rubble to build and rebuild their borrows.
do allot of reading before keeping one of these creatures please