I saw a TV documentary today which claimed that salmon was named in Latin by Julius Caesar. It was a side remark, but the narrator elaborated that he saw this fish in Gaul and gave it its name due to its leaps. However, I did not manage to find anything to support this claim.
So: Do we know if salmo is connected to salire? The derivative looks unusual to me, and I can't think of any other similar pair in Latin. Did Caesar even discuss salmons in the first place? Is there any truth to the story, or should I dismiss it as folk etymology?
In case anyone is interested, it was mentioned around 10:54–11:14 in this Finnish documentary. (It can only be viewed from within Finland, and it is in Finnish.)