Underground waterways/pathways

Atm to travel from one pond to another, you have to plod over land. As such when playing aquatic/semi-aquatic you pretty much sit in one pond. This is fine for some dinosaurs but unattractive for others. If we could add some underground waterways between major ponds it would add an extra element to the game. These waterways could be like a maze or labyrinth filled with their own dangers.