To be sure of the identification, I would have to see the tail, but from the eyes and general shape and color, I would guess that this is a Gonodactylellus affinis. It reaches a maximum size of just over an inch and generally is found in rubble from 10 to 50m. They live for at least three or four years, perhaps longer. While they are rarely seen, when we collect stomatopods from deep water rubble, this is probably one of the most common species. They occur from French Polynesia to at least Thailand. They also can change color depending on the lighting and color of the tank they are in. Most of the ones that we collect below about 20 m are reddish, but nearer the surface they can be brown or green. Hope this helps.
Ro