I set out to catch the old fish, and after a few hundred casts, I did. I kept him for a while, then once my bank started to fill up, I tossed him. Now this old fish wont leave me alone! Whenever I go to catch a Baby Crocolisk for Crocolisks in the City, the fish will, every now and then, pop up and the funny part is, I am unable to loot him. What a mean little fish.
Edit: I really should use search next time.