Chelmon rostratus

This is the Copperband Butterflyfish. It is a popular kind of butterflyfish. They can be found in aquariums, including as pets. It was in the children's picture book Goodnight Seahorse by Carly Allen-Fletcher. For some reason in the back of the book it's white parts are yellow. It is listed as "Butterfly Fish".Goodnight Seahorse by Carly Allen-Fletcher 
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