Fishing for the Big One

Fishing for the Big One is a quest given to you by a Soldier in Fire Emblem Three Houses.

Requirements
"Catch the Big One, the mysterious fish of legend that is said to have appeared in the fishing pond."

Quest-Giver Dialogue
"The fish seem skittish lately... It's said that every five years, in the wake of a storm, a mystery fish appears and eats up all of the other fish in the pond. They call it the Big One. I thought that it was just a legend though."

Location
Given to you by a soldier. Available after the time skip.

Rewards

 * Fishing Float (x1)
 * Herring Bait (x2)
 * Bullhead (x1)
 * 500 Renown

Strategy
Unlike most fish, this one appears as a purple fish icon called "Strange Fish Shadow". Time the rhythm and the player may get a Perfect.