Why is goldfish called acacia?

Goldfish is called "Acacia" because in the traditional culture of China, goldfish is often used to express the feelings of Acacia. Goldfish was an auspicious animal in ancient China and was regarded as a symbol of love, friendship and family harmony. Especially in ancient poetry, goldfish is often used as a metaphor for the suffering of lovesickness. For example, in the Tang Dynasty poet Bai Juyi's Spring Tour in Qiantang, there are "smoke cages, cold water, moon cages and sand, and night parking near Qinhuai restaurant." Strong women in business don't know how to hate their country, but they still sing backyard flowers across the river. Blue waves rippling, clear apes whistling, mangrove dew.