Yes, Amblygobius bynoensis it is. I haven't kept this species, but have collected it in northern Australia (at Sweers Island, Gulf of Carpentaria). It was abundant in rock pools with a silty sand bottom, as well as in adjacent shallow reef areas with silty sand bottom. I have kept a few other Amblygobius species through the years, and expect it to behave like A. phalaena and similar species. So make sure there is a good amount of sand for sifting. I'd also avoid keeping more than a pair together. In my experience with A. phalaena, the bigger one(s) will hassle the smaller ones to the point that they stop feeding properly.
Tony