What does "goldfish" mean?

Looking at goldfish originated from Cantonese, which is a lewd expression of men to young girls and has wild thoughts about girls.

Look at the goldfish stalks, which originated from a Hong Kong case of 1960. According to the police investigation, a man lured the little girls to molest or rape in a deserted place on the grounds of keeping goldfish on the rooftop and taking them to see them. Later, people used goldfish to represent pedophiles, even men who talked about young girls, especially old men, with obvious deceptive purposes. This is the origin of watching goldfish stalks. Looking at goldfish originated in Cantonese, which is a manifestation of men's indecency towards young girls, and they have wild desires for girls. Goldfish, a Cantonese word, is another name for pedophilia. People use goldfish to represent pedophiles, even men who talk about young girls, with obvious deceptive purposes. It's a subtle colored joke to tell others in Cantonese that uncle will take you to see goldfish.