Hello, here you can check what I mean. What are the commonest phrases you use when passing by a fisherman in Italy? You can see what French say, so I think the Italian phrase might be a simple: Mordono? Thanks.
You're right! I don't know why, but I was picturing the fisherman as somebody who was selling fish (in this case "Mordono?" would fit better).
Actually, if he's fishing, one might say "Abboccano?" and definitely not "Mordono?".
The issue about the common use of it remains, though. Even if "Abboccano?" sounds to me a little more natural.