Class and Job Quests ⇒ Studium Quests ⇒ Faculty of Aetherology Quests
Lv. 90 Pastures New
part 3 of the quests states the following
"Catch lunar lamenters and deliver them to T'laqa Tia."
implying that multiple lunar lamenters need to be caught but you only need one to progress the quest. The step should say something like *Catch a lunar lamenter and deliver it to T'laqa Tia*