For some reason I get fish swimming in my roads. I guess they entered from a road I built next to water. It might be one of my other mods causing this though, I haven't tested it.

I'm seeing the same thing happening.

In fact, I've seen fish swim between water and roads where roads touch the water. I have a bunch of mods installed, so it could be one of the other ones, I suppose, but given that I always seem to see them swimming in roads, this mod seems like a likely suspect.

Not really a high-priority bug of course, more of a distraction.

Road fish

This is something I saw happening before one of the updates awhile ago. Before the update (can't remember which version), you could place Road down directly over water without landfilling it first; after the update you had to place landfill before you could place any Road. Any Road placed directly over water would allow fish to swim through it because the water was actually still there, and it was also possible to pick up the Road you were standing on and drown.