Microspathodon chrysurus
Encyclopedia
Microspathodon chrysurus 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 Western Atlantic. It occasionally makes its way into the aquarium trade, where it is known as the Marine Jewelfish (not to be confused with the freshwater Cichlid, known as the Jewelfish) . It grows to a size of 21cm in length. When juvenile it has brilliant (metallic) blue spots on a dark blue back ground. It is probably the most aggressive of all Damselfish, and should be kept with fish substantially larger and more robust than itself.
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