I recently got the midway point of the quest Feast of Famine. When I turned in the first set of fish Wawalago was half way into singing my praises and talking about said fish when another npc comes running over to us to tell us something distressing. That thing being that no one seems to be able to get any of the regular amounts of haul from the Rhotano Sea. He suspects that the currents might to be to blame. The wording is very close to what happens in the Studium Fishing quests.

In that questline we find out that the reason the currents are a mess is due to Zodiark having been defeated and thus having an affect on them as they go about reverting to pre Zodiark conditions. Anyone who's finished Feast of Famine and the Studium quests willing to give an answer?

Fish lore is wild and probably shouldn't be ignored as much as it does