Tired of ocean fishing? Try dungeon fishing! Catch "big" fish while avoiding the spawn! Watch out for hypothermia!
Tired of ocean fishing? Try overland fishing! Caution: the smell of fish wildly attracts Ratmen! Amazingly, no water required!
I answered you in IRC already. No - See this thread where there is no mention of any Big Fish in the results from 500 nets: http://uorforum.com/threads/special-fishing-nets-by-the-numbers.17261/ Further, if you look at the total number of fish steaks (592), there's no way that cut-up big fish were part of that count. There would have been significantly more fish steaks if that were the case given that you get 1 per serpent.
Fished up a mib as i sailed along before I could start moving ... Turns out the bottle didn't get very far from the ship before this serpant swallowed it up
Got home from work 15 min before the tournament ended, so I thought I'd rush out to sea to see what I could see see see, and fished this up: