Dischistodus prosopotaenia
Encyclopedia
Dischistodus prosopotaenia is a Damselfish
Damselfish
Damselfish comprise the family Pomacentridae except those of the genera Amphiprion and Premnas. They can grow up to long. While most are marine, a few species inhabit the lower stretches of rivers in freshwater. Damselfish usually have bright colors. in tropical coral reefs, and many of those are...

 from the Indo-West Pacific. It occasionally makes its way into the aquarium trade. It grows to a size of 17cm in length.
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