noun, plural da·ni·os.
any of several cyprinid fishes of the genera Danio and Brachydanio, of India and Sri Lanka, often kept in aquariums.
Origin of danio
Borrowed into English from New Latin around 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -os
any brightly coloured tropical freshwater cyprinid fish of the genus Danio and related genera: popular aquarium fishes
Word Origin for danio
C19: from New Latin, of obscure origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012