In this fable, a scavenger fish cleans up everyone's mess, maintaining the equilibrium in a fish tank. However, this over-functioning can lead to burnout. The moral is to avoid working too hard. When the scavenger fish stops cleaning up, it disrupts the system's balance, causing dysfunction. This concept is compared to a drain trap in a house. Similarly, in any system, certain individuals serve as anxiety traps, either over-functioning or adapting to others' behavior to prevent anxiety from spreading.