crucian carp
noun
cru·cian carp ˈkrü-shən- 
: a European cyprinid fish (Carassius carassius)
called also crucian
Example Sentences
Recent Examples on the Web The rubbish pits of Jiahu also contain a suspiciously large amount of common carp—which, despite its name, should have been much harder to catch than another species called crucian carp. 
Kiona N. Smith, Ars Technica, 17 Sep. 2019 Goldfish and crucian carp, however, metabolize those carbs differently than other animals when oxygen is scarce. Jason Daley, Smithsonian, 14 Aug. 2017
Kiona N. Smith, Ars Technica, 17 Sep. 2019 Goldfish and crucian carp, however, metabolize those carbs differently than other animals when oxygen is scarce. Jason Daley, Smithsonian, 14 Aug. 2017 Word History
Etymology
modification of Low German karuse, from Middle Low German karusse, perhaps of Baltic origin; akin to Lithuanian karušis carp
First Known Use
1836, in the meaning defined above