You would think it would be common sense not to do this on your cruise, but it is not.
Spoiler Alert: If you are caught doing this on a cruise, you can be banned from that cruise line forever. That's exactly what happened to the couple seen in this video.
Multiple rules were broken during this balcony fishing escapade, and the couple has been banned for life from Carnival Cruise. The rules broken include keeping all live animals – except for service animals – off the ship, “discharging or releasing any unauthorized item overboard,” and fishing without a permit.