It is a quest prompt in Starry Midnight Port. Quest name is "[Daily] Empty Food Storage".
Requirement:
-Catch Yellowfin Sole
-Give Yellowfin Sole to Ahib Soldier

Description Text:
"While the Ahib was looking for the cause of an emptying food storage, it became clear that workers had done it. She decided to let it slide just this once and show no mercy the second time. Let's help the Ahib fill up the food storage."

Fish delivery prompt has the mistranslation of the "Yellowfin Sole" as Leggings.