Characidae, the characids or characins is a family of freshwater subtropical and tropical fish, belonging to the order Characiformes. The name "characins" is the historical one, but scientists today tend to prefer "characids" to reflect their status as a by and large monophyletic group at family rank. To arrive there, this family has undergone much systematic and taxonomic change. Among those fishes that remain in the Characidae for the time being are the tetras, comprising the very similar genera Hemigrammus and Hyphessobrycon, as well as a few related forms such as the cave and neon tetras. Fish of this family are important as food and also include popular aquarium fish species.
Minnow is the common name for a number of species of small freshwater fish, belonging to several genera of the families Cyprinidae and Leuciscidae. They are also known in Ireland as pinkeens.
The Squaliformes are an order of sharks that includes about 126 species in seven families.
Batrachoididae is the only family in the ray-finned fish order Batrachoidiformes. Members of this family are usually called toadfish or frogfish: both the English common name and scientific name refer to their toad-like appearance.
Barbels are group of small carp-like freshwater fish, almost all of the genus Barbus. They are usually found in gravel and rocky-bottomed slow-flowing waters with high dissolved oxygen content. A typical adult barbel can range from 25 to 100 cm in length and weigh between 200 g and 10 kg, although weights of 200 g are more common. Babies weigh 100–150 g.
The Catostomidae are the suckers of the order Cypriniformes, with about 78 species in this family of freshwater fishes. The Catostomidae are almost exclusively native to North America. The only exceptions are Catostomus catostomus, found in both North America and Russia, and Myxocyprinus asiaticus found only in China. In the Ozarks they are a common food fish and a festival is held each year to celebrate them. The bigmouth buffalo, Ictiobus cyprinellus, can reach an age up to 127 years, making it the oldest known freshwater teleost by more than 50 years.
Hemibarbus is a genus of cyprinid fish found in eastern Asia. There are currently 12 recognized species in this genus.
The barbel steed is a species of small freshwater fish in the family Cyprinidae. It is found throughout the Amur basin in eastern Asia to northern Vietnam, Japan and islands of Hainan and Taiwan.
Hemibarbus mylodon is a species of freshwater cyprinid fish endemic to Korea. It is commonly called spotted barbel or Korean doty barbel. It inhabits the upper stream of Imjin, Han and Geum River. As of 2008, it is classified as endangered species.
Gobioninae is a monophyletic subfamily of Eurasian cyprinid fishes. A species-rich subfamily, it is divided into five tribes: Gobionini, Pseudogobionini, Hemibarbini, Coreiini, and Sarcocheilichthyini.
Belligobio pengxianensis is a species of cyprinid fish endemic to China. It is found in the Amur River.
Hemibarbus brevipennus is a species of small freshwater fish in the family Cyprinidae. It is endemic to Lingjiang and Oujiang rivers in China.
Hemibarbus lehoai is a species of small freshwater fish in the family Cyprinidae. It is endemic to Vietnam.
Hemibarbus longirostris is a species of small freshwater fish in the family Cyprinidae. It is found in Japan, the Korean Peninsula and China.
Hemibarbus macracanthus is a species of small freshwater fish in the family Cyprinidae. It is endemic to China.
Hemibarbus medius is a species of small freshwater fish in the family Cyprinidae. It is endemic to southern China.
Hemibarbus qianjiangensis is a species of small freshwater fish in the family Cyprinidae. It is endemic to the Qiantangjiang River in Zhejiang Province, China.
Hemibarbus songloensis is a species of small freshwater fish in the family Cyprinidae. It is endemic to Vietnam.
Hemibarbus thacmoensis is a species of small freshwater fish in the family Cyprinidae. It is endemic to Vietnam.
Hemibarbus umbrifer is a species of small freshwater fish in the family Cyprinidae. It is endemic to the Xi River in China.
