Rose Bitterling generally inhabits lowland rivers and lakes, lives in schools, and is omnivorous. They exhibit sexual dimorphism where mature males are larger and have more vibrant colouration than females. Their breeding behavior is quite unique: during breeding season, females use their extended ovipositor to lay eggs inside living freshwater mussels, after which males fertilize them. The fertilized eggs subsequently hatch inside the shell.

We had been working to breed Rose Bitterlings in the Park, and in 2014 we successfully bred a small number of juveniles and released to suitable habitats inside the park. To date, we have discovered stable populations in various water bodies. What an encouraging result!