Macropodus hongkongensis is a species of paradise fish (Macropodus) endemic to southern China. This species was first discovered in Hong Kong, but later was found in other areas of southern China.[1] It is found in mountainous regions as well as lowland habitats. This species grows to a length of more than 10 cm.
Like other Macropodus, M. hongkongensis is popular among Chinese fish keepers and is called "Hong Kong black paradise fish (Traditional Chinese:香港黑叉尾鬥魚 or HK黑). This fish is easy to keep and breed in aquariums but has a reputation for being unusually aggressive.