It's Tuesday evening December 29 and I am heading to the east side, late to watch the basketball game. I'm crossing the SR 26 bridge over the Wabash. It's dark but I notice three animals below me at the surface of the river, swimming downstream. My first thought was that they were carp but they were too big and their backs were out of the water, they must have been mammals. I am guessing they were river otters (Lontra canadensis), they were about the right shape and size. I only saw them for a second so I didn't get a photo and it was too dark anyway. They must have noticed me watching them, as they crossed under the railroad bridge, they dived and disappeared.
Link to Lontra canadensis:
Link to otters in Indiana: