The Mudskipper normally referred to as the Atlantic Mudskipper is P Barbarus which is much larger than the ones normally labelled as Indian Mudskippers. P Barbarus will not tolerate tankmates, you might be lucky if you have a massive tank that allows a large volume of water capable of housing underwater fish of a similar size that won't fit in their mouths such as Scats, Archers or Anableps. The problem is that unless your tank is about 3 metres long you won't be able to provide a sloping sandbank and sufficient dry area to keep the skippers happy.