What is the ruling on the sticky, mucus-like fluid that exits in large quantities from an unmarried girl; does it necessitate ghusl or wudu?

A woman is not required to perform ghusl (ritual bath) due to fluid discharge from her private parts unless it is confirmed to be maniyy (seminal fluid). For any other discharge, wudu' (ablution) is sufficient. If the described fluid discharge matches the characteristics of a woman's maniyy, then it is indeed maniyy, and ghusl becomes obligatory if it exits during wakefulness with desire, or during sleep regardless of desire. Otherwise, ghusl is not obligatory, but wudu' is. If doubt persists regarding whether the discharge is maniyy or something else, many scholars state that ghusl is not obligatory. Rather, you have the choice to attribute to this discharge the ruling of one of the doubtful matters.