Talk:Quests/@comment-25140987-20150811065423

Interesting trick:  if you catch a quest fish, and then put it in your piggybank, you can catch another copy of the same quest fish in the same day. You can only turn one of them in, but you can save the others and turn one in the next time the Angler asks for that fish. Potentially a big time-saver for out-of-the-way fishing locations like the ocean.

(Probably putting the quest fish anywhere but your inventory lets you catch another copy, but I only tested with the piggybank.)