Hong Luck Dangtou is a goldfish.

Body length 10-15CM, round belly and small tail, smooth back arch, no dorsal fin, silver-white color all over the body, only bright red sarcoma on the top of the head, the sarcoma is square and thick. The Forehead Red is a specialty among Chinese goldfish with a low heritability. Feeding water temperature 10-28 degrees Celsius, preferring neutral soft water, bait with worm fish, water earthworms, pellet feed, etc.. The age of sexual maturity of the parent fish is 12 months, males have prismatic protuberances on the abdomen, females have a soft abdomen, every spring is the breeding season of goldfish, aquatic plants oviposition. Those with a high bulging sarcoma on the top of the head are red-headed tigerheads, which should be distinguished from gooseheads red. The width of the lower jaw and both gill parts is about 3.7~4.0 centimeters