noun Download 🔗Share Any of a group of conspicuous tropical marine fish of the family Chaetodontidae; the bannerfish and coralfish are also included in this group. Butterflyfish are fairly small, mostly from 12 to 22 cm (c.7-9 in) in length. Examples : "While snorkeling in Hawaii, we saw several brightly colored butterflyfish swimming around the coral. " fish animal organism biology ocean nature environment Chat with AIVocabulary GamePractice Reading