crucian carp
Concise Oxford English Dictionary © 2008 Oxford University Press:
crucian carp /ˈkruːʃ(ə)n/
▶noun a small carp of still or slow-moving waters, farmed in eastern Europe. [Carassius carassius.]
– origin C18: from Low Ger. karusse, karutze, perh. based on L. coracinus, from Gk korax ‘raven’, also denoting a black fish found in the Nile.
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