Yes, it does appear to be a goby! I emailed Sergey Bogorodsky after finding this thread. He is in the process of describing this new species, so he asked if I would like to collaborate and collect some more. I am planning on going out in October to try and find some more of the little guys. Back in May, I found them in a coral rubble patch at around 15m depth near these coordinates (22° 13.6558 N, 38° 58.1853 E)
I am doing my MS thesis on microhabitat association of cryptobenthic gobies, so I was out collecting a whole bunch of them. I am definitely interesting in increasing the knowledge of goby biodiversity!