chromis

noun
chro·​mis | \ˈkrō-məs \
plural chromis

Definition of chromis 

: any of a large genus (Chromis) of damselfish including some commonly kept in tropical aquariums You'll never be able to count all the brown and blue chromis swimming over your head.— Nick Lucey, Rodale's Scuba Diving, August 1997 We then part a school of brilliant blue chromis fish darting about in pursuit of tiny planktonic prey.— Joseph E. Neigel and John C. Avise, Natural History, December 1984

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First Known Use of chromis

1854, in the meaning defined above

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The first known use of chromis was in 1854

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