noun
sleek unicornfish; blacktongue unicorn
A species of Indo-Pacific tang (Naso hexacanthus). Also known as Thorpe's unicornfish or nohorn unicorn. The name テングハギモドキ means 'false tengu surgeonfish', distinguishing it from the related テングハギ.
ダイバーはテングハギモドキの群れを観察した。
The diver observed a school of sleek unicornfish.