“living in the ponds at Dr. Sun Yat-Sen Park in Chinatown.”
I’m from the city and know that area very well, especially that park (best dimsum on earth across it) . This has been going on for the past 20 years. Either raccoons, badgers and cats get those koi but the neighborhood is full of rich Chinese who keep filling that damn pond with these pricey fishes. Even saw Japanese students just grab one and put in a plastic bag once..