: any of numerous often brilliantly colored marine fishes (family Pomacentridae) living especially along coral reefs

called also demoiselle

Examples of damselfish in a Sentence

Recent Examples on the Web
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Next, the researchers trotted out a parrotfish model, which the damselfish didn’t investigate as frequently and didn’t register as a threat. Matt Hrodey, Discover Magazine, 8 Aug. 2023 Experiments show that damselfishes, sharks and crabs raised in or exposed to highly acidic water may fail to smell predators or to find food or may uncharacteristically wander into dangerous places. Danielle L. Dixson, Scientific American, 1 June 2017

Word History

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of damselfish was in 1904

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Cite this Entry

“Damselfish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/damselfish. Accessed 1 Apr. 2025.

Kids Definition

damselfish

noun
: any of numerous often brilliantly colored marine fishes that live especially along coral reefs

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