surgeonfish

/S ER1 JH AH0 N F IH0 SH/
noun
  1. 1

    Any of many species of reef-dwelling fishes, most of them brightly coloured, of the family Acanthuridae. They are named "surgeonfish" because they bear erectile, scalpel-like, dangerously sharp spines on either side of the caudal peduncle.

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Source: https://en.wiktionary.org/wiki/surgeonfish