Timmy,
I wrote a long response this morning identifying this animal, but I don't know what happened to it. Anyway, the short answer is that the animal is almost certainly Gonodactylellus snidsvongi. Erdmann described it from Indonesia as G. hendersoni including s detailed description of the blue dot pattern. In 2000, Ahyong did away with G. hendersoni and split it into three species, G. demanii, G. molyneux and G. snidsvongi (originally described by Naiyanetr in 1987). The key to the id is the shape of the uropod endopod and the fact that it has no setae on the inner surface. This is a tiny species. The largest known individual is from Okinawa and is 17 mm.
Roy