Causes of bent dorsal fins in angelfish?

Bent dorsal fins in angelfish can be caused by several factors, including poor water quality, inadequate diet, and stress. High levels of ammonia, nitrites, or nitrates in the water can lead to health issues, resulting in deformities. Additionally, nutritional deficiencies may impact their growth and fin development. Stress from overcrowding, aggressive tank mates, or sudden environmental changes can also contribute to this condition.