Looking good. Did you ever figure out what species you have?
If its not indian, its probably an Atlantic, and that was my guess anyway based on your pictures..although without a shot of the erect dorsal fin its hard to tell. I'll post some pics of the Atlantic I had when I get home tonight, but in the meanwhile you can look up pictures of Periophthalmus barbarus, aka Atlantic aka African mudskippers and see if that looks like the one.